Agates Lexicon

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ID Agate
2298Rabbit Ranch black agate, Arizona, see McMackin, C.E. (1976d, p. 2296-2309). Rabbit Ranch is listed in the U. S. Geological Survey geographic names data-base as being at 32o 50' 18" N and 110o 53' 01" W, Pinal County., Black Mountain Map, U.S. Geological Survey, 7.5' x 7.5'.
2299Rainbow Agate, descriptive, a very finely banded agate up to 17,000 bands/inch (Brewster, in Ferguson, et al, 1806) that acts like a diffraction grating and produces spectral colors. Also, synonym for iris agate, which see. Miller & Olsen (1967, p. 1312-1314) used this term informally for a seam agate of several colors found near Janos, 38 miles north of Casas Grande, Chihuahua, Mexico.
2300Rainbow Brazilian Agate, Brazil, from Janas, Brazil (Mattos, 1974, p. 5) It is not possible to determine from the description if this is simply brightly colored agate or iris agate. Adv., Rocky Joes, Rock & Gem, v. 2, no. 5, p. 56.
2301Rainbow Chalcedony, near Goldfield, Nevada, àvariegated silica, many patterns, adv., Hermitage Gemstones, Lapidary Journal, v. 42, no. 3, p. 108.
2302Rainbow Jasper, Golden Gate Bridge Area, San Francisco, California. adv. Francis J. Sperisen, Lapidary, The Mineralogist, v. 3, no. 10, p. 20. ...Africa, no description, adv., Aleta's Rock Shop, Lapidary Journal, v. 29, no. 10, p. 1885.
2303Rainbow Jasper, term used by Mitchell (1986, p. 47) to describe jasper from about secs. 20 and 21, T. 11 N., R. 6 E., San Bernardino County, California, Cave Mountain Quadrangle, U. S. Geological Survey, 7.5 minute series (Topographic). Berkholz (1962, locality 8, 1971, p. 16) listed a Rainbow Ridge about 10 miles southwest of Inyokern, California, but Geographic Names Information System does not list such a site in the El Paso Mountains in Kern County, California. Thus, the term appears to be a collectors term of wide use.
2304Rainbow Plume Agate, no locality, ...plumes of all colors in clear background, adv., Smoky Mtn. Rock Shop, Lapidary Journal, v. 27, no. 7, p. 1068.
2305Rainbow Ridge Agate, California?, no locality, no description, adv., Gemex Co., Lapidary Journal, v. 20, no. 8, p. 925. Charles Gem Center, Lapidary Journal, v. 25, no. 1, p. 158.
2306Rainbow Ridge Dendritic Agate, California?, no locality, no description, adv., Charles Gem Center, Lapidary Journal, v. 24, no. 9, p. 1246.
2307Rainbow Ridge jasp-agate, California, scenic agate (Chenard, 1962, p. 106). See comments under Rainbow Ridge Jasper.
2308Rainbow Ridge jasper, collector's term for a jasper from the eastern section of the El Paso Mountains, Kern County, California. See Berkholz (1962, locality 8, 1971, p. 16). The place name Rainbow Ridge does not appear in Geographic Names Information System.
2309Rainbow Ridge Opal, Virgin Valley, Nevada, adv., W.N. Wittemore, 209 E. Islay, Santa Barbara, Calif., The Mineralogist, 5, no. 5, p. 22.
2310Rainbow Ridge Scenic Agate, adv., Griegers, Rocks and Minerals, v. 38, no. 9,10, p. 461. ...cut with grain for scenes. Adv., Shale's, Lapidary Journal, v. 15, no. 5, p. 537. ...multi-colored picture agate, pink, yellow, white, dendrites, anon (Lapidary Journal. 1978, p. 1139)
2311Rainbow Wood, late Pennsylvanian age silicified wood from about 8 miles west of Welch, Oklahoma, described as being red, yellow, pink, brown, and black by Rice (1971, p.601).
2312Rainforest jasper, a spherulitic or sphaeroidal rhyolite from Australia., blue, yellow "eyes", adv., Goodnow Gems U.S.A., Lapidary Journal, v.29, no. 4, p. 723. O=Donoghue (1987, p. 82, 83) suggested the name Australian Rainforest Jasper and Rainforest Agate were used interchangeably in the United States. Synonym of "Marine Agate" and/or "Sepularite Rhyolite", Australia, ...shades of blue, tan, yellow, light green spots, adv., Goodnow Gems U.S.A., Lapidary Journal, v. 27, no. 10, p. 1487.
2313Rainforest Jasper, no locality, with oranges, adv., Riviera Lapidary Center, Rock & Gem, v. 7, no. 8, p. 85.
2314Rain Forest Jasper, Australiaö, term used by Shaub (1981, p. 2522-2544, 2546-2549) for a sphaeroidal rhyolite.
2315Rain Forest Picture Nuggets, Australia?, may be same as Frin Forest Jasper, adv., Jackson=s Gems, Lapidary Journal, v. 39, no. 3, p. 83.
2316Ramshorn Mountain Japser, Montana, probably a local name, brown and black banded jasper, probably named for Ramshorn Mountain, 45o 27' 59" N and 111o 56' 40" W, Madison County, Montana.
2317Randall Creek Petrified Wood, for Randall Creek, that extends from 32o 25' 09" N to 32o 36' 24" N and 082o 37' 34" W to 084o 48' 16" W, Chattahoochee County, Georgia, Scott and Ochillee Maps, USGS 7.5' x 7.5'. ...natural wood colors, adv., Aubrey Bottoms, Lapidary Journal, v. 17, no. 2, p. 305.
2318Randsburg Agate, California, no description, for Randsburg, 35o 22' 07" N 117o 39' 26" W, Kern County, California, Johannesburg Quadrangle, U.S. Geological Survey, 7.5 Minute Series (Topographic). This is advertized as a banded agate with no further description by Chuck Jordan, Lapidary Journal, v. 2, no. 1, p. 17.
2319Ratanpur, India, historic agate locality, see Francis (1983, p. 1980-1987).
2320Rattle Snake Hollow, Alabama, probably a locally used name that came to me through correspondence with Bill Reynolds (January 21, 1998). It is probably a variation of Paint Rock Agate.
2321Rattle Snake Lace Agate, Mexico, no description, adv., Riviera Lapidary Center, Lapidary Journal, v. 37, no. 1, p. 167.
2322Red Agate, Utah, from Cisco to Moab, no description, see Stewart (1960, p. 20).
2323Red Agatized Wood, Idaho, no description, adv., Stewart's Gem Shop, Lapidary Journal, v. 5, no. 2, p. 137.
2324Red Algae Jasper, Minnesota?, no description, may be synonym of Mary Ellen Jasper, adv., Tangborn's Rock Shop, Lapidary Journal, v. 15, no. 1, p. 167
2325Red and Golden Fern Moss Agate, description?, locality?, adv., George C. Curtis, "The Agate Man", Lapidary Journal, v. 1, no. 4, p. 188.
2326Red and Green Moss Agate, India, color illustration in adv., Harry Sering Co., Lapidary Journal, v. 32, no. 3, p. 678-679.,
2327Red and White Silica Onyx, Nevada?, no details, chalcedony with wavy, curly bands, adv., Brown's Atelier, Nevada, The Mineralogist, v. 15, no. 1, p. 31.
2328Red and White Striped Jasper, Brazil, adv., Goodnow Gems U.S.A., Rock & Gem, v. 4, no. 2, p. 5. Goodnow's advertizement does not imply this is dolomitic.
2329Red and Yellow Sagenite, no locality, no description, adv., Gemex, Lapidary Journal, v. 20, no. 8, p. 925.
2330Red Ball Agate, Mexico, adv., Goodnow Gems U.S.A., red & white stripes, Rocks and Minerals, v. 47, no. 4, p. 233; ... banded, few quartz duds, adv., Rock & Gem, v. 2, no. 3, p. 22.
2331Red Band Agate, Utah, no description, adv., I. R. Vowdrey, Lapidary Journal, v. 5, no. 1, p. 53.
2332Red Centered Agate, Utah, no description, adv., Huberts Rock Shop, Lapidary Journal, v. 9, no. 5, p. 87.
2333Red Chalcedony, Emery Co, Utah, ( =Pigeon Blood Agate?), adv., Ward's Natural Science Establishment, The Mineralogist, v. 4, no. 11, p. 17.
2334Redcliff, Rhodesia (Zimbabwe), locality reported by Zeitner (1968, p. 960-966).
2335Red Dendritic on Blue Agate, Durango, Mexico, adv., American Producers, Rocks and Minerals, 39, no. 5,6, p. 307.
2336Red Desert Agate, Wyoming?, no details, adv., Tynsky Service, The Mineralogist, 17, no. 67, p. 334.
2337Red Desert black palm, Wyoming, black---not Eden Valley Wood, adv., Stanton's Crafts, Wyoming, Lapidary Journal, v. 16, no. 1, p. 95.
2338Red Fern Moss, no locality, no description, adv., George Curtis, Earth Science Digest, v. 1, no. 11, p. 19.
2339Red Filament Agate, no locality, no description, adv., Greenway Slabs & Cabs, Rock & Gem, v. 6, no. 12, p. 94; Lapidary Journal, v. 30, no.5, p. 1238.
2340Red Flame agate, Mexico, clear agate, brilliant red flames, adv., Technicraft Lapidaries Corp, Lapidary Journal, v. 12, no. 3, p. 385; Rocks and Minerals, v. 34, no. 1,2, p. 57. Al Arnold, Rocks and Minerals, v. 52, no. 6, p. 262. Cross (1996, p. 76) lists this with flame agate, which see.
2341Red Flowering Agate, Durango, Mexico, no description, adv., Rivera & Sons, Lapidary Journal, v. 30, no. 12, p. 2816.
2342Red Hill Agate, New Mexico, for Red Hill, a cinder cone that is about 20 miles southwest of Zuni Salt Lake. Red Hill is a service station and cafe situated about 12 miles from the collecting site. The U. S. Geological Survey geographic names data base shows Red Hill Summit at 34o 17' 41" N and 108o 53' 28" W, and Red Hill village or stop at 34o 13' 07" N and 108o 52' 18" W, Catron County. Smith (1973, p. 120, 140) used Zuni Lake as a land mark and this is situated at 34o 26' 56" N and 108o 46' 03" W., Catron County.
2343Red Horn Coral, Kansas, no details, adv., Elmer Wilcox, The Mineralogist, v. 32, no. 4, p. 37. See Simpson (1975, p. 30, 31); a coral of Pennsylvanian age, cf. Pseudozaphrentoides.
2344Red Horn Coral, Pennsylvanian?, Utah. See Bushman (1981, p. 2220-2226). Name appeared in adv., Gem Shop, Lapidary Journal, v. 43, no. 10, p. 134. Zeitner (1991, p. 77-90) suggested this material came from Riley Canyon, Utah. Geographic Names Information System shows two Riley Canyons in Utah and the one that yielded the agatized corals has not been determined, 06/10/99.
2345Red Lapland Jasper, Finland, bright earth red with silver like patterns, K & D Koski, Lapidary Journal, v. 34, no. 1, p. 412. See Lapland Jasper.
2346Red Ledge Lace Agate, Mexico, no description, adv., Vaughan=s Lapidary, Gems and Minerals, no. 326, November, 1964, p. 48.
2347Red Marble Agate, Brazil?, no description adv., Prof's Rock Shop, Lapidary Journal, v. 30, no. 5, p. 1194.
2348Red Matrix Thundereggs, Oregon, no description, adv., Nelson the Rocky Feller, Lapidary Journal, v. 28 no.1, p. 227.
2349Red Moss, Mexico, no description, adv., B &H Rock Shop, Granbury, Texas, Earth Science, v. 13, no. 6, p. 240.
2350Redondo Beach Agate, for Redondo Beach, California. The site is now mostly occupied by Redondo Beach State Park, 33o 49' 45" N and 118o 23' 22" W, Los Angeles County, Redondo Beach Map, USGS 7.5' x 7.5'. Rocks and Minerals, v. 18, no. 8, p. 243. See Schwartz (1943d, p. 243) and Hagar, D., 1946, ôA few California locations,ö Earth Science Digest, v. 1, no. 5, p. 8û9. Synonym: Bluff Cove.
2351Redondo Beach Moonstone, Redondo Beach, California, no description, adv., Christie Conway, The Mineralogist, v. 17, no. 10, p. 473.
2352Redondo Beach "Moonstone" Agate, California, no description, adv., S-T Gem and Mineral Shop, Lapidary Journal, v. 4, no. 3, p. 223. See also Redondo Beach Agate.
2353Red Moss, Oregon, adv., Central Oregon Gem Supply, Earth Science, v. 13, no. 2, p. 73.
2354Red Palm Wood, California, no further details, Adv., S-T Gem & Mineral Shop, The Mineralogist, about v. 15
2355Red Paradise Flame Agate, Mexico?, no details, adv., Merles Rock Box, The Mineralogist, v. 26, no. 4,5, p. 137.
2356Red Plume Jasper, no locality, no description, adv., Technicraft Lapidaries Corporation, The Mineralogist, v. 26, no. 6,7,8, p. 192.
2357Red Radiaolarian jasper, jasper found in Graubunden, Switzerland, and particularly well suited for use as a touchstone. Used in many Italian mosaics (See Rossi and Martello, 1984, p. 75).
2358Red Rock Canyon Agate, 24 miles North of Mojave, California, area reported by Lewis (1942, p. 116) that has yield moss and picture agates and jasper according to MacLachlan (1950, p. 96-100). The Geographic Names Information System shows it is situated at 35o 19' 30" N and 117o 56' 59" W, Kern County, California, Cantil Quadrangle, U. S. Geological Survey, 7.5 Minute Series (Topographic). See (Chenard and Chenard, 1962); Chapman (1937, p. 9, 10, 111-114) who stated that the agates were produced from rocks of the upper Miocene and lower Pliocene ages. Berkholz (1962, locality 8c) recorded petrified wood, agate and jasper from this site.
2359Red Sagebrush Agate, Utah, no description adv., Alpine Gems & Minerals, Lapidary Journal, v. 34, no. 1, p. 178.
2360Red Skin Geodes, Chihuahua, Mexico, àcommercially offered as ôNew Chalceö geodes; hollow thunder eggs with clear to white chalcedony, drusy quartz linings. See Cross (1996, p. 112, fig. A).
2361Red Spider Web Agate, Mex., adv., Little Gem Shop, Rocks and Minerals, v. 36, no. 3,4, p. 207.
2362Red Splash agate, Mexico, vein agate, Gorin's Gemarts & Rocks, The Mineralogist, v. 29, no. 9,10, p. 32.
2363Red Striped Jasper, no locality, no description, adv., Bishops Lapidary, Lapidary Journal, v.28, no. 2, p.423.
2364Red Swirl Agate, Mexico?, no description, adv., Gem Center U.S.A., Lapidary Journal, v. 24, no. 11, p. 1499.
2365Red Top Agate, term applied to scenic or dendritic agates where black or brown trees or dendrites have red terminations. Much of this material is from Montana Agate. Anon., 1934.
2366Red Top Agate. See Oregon Mineralogist, v. 2, no. 2, p. 12; also, Frazier and Frazier (1988) listed multiple localities; Montana, Cle Elum, Washington. Red Top has been used as a form modifier (above) or as a source area (below).
2367Red Top Blue Agate, Washington, no description, probably a synonym of Ellensburg Blue Agate, Fowler (1954, p. 476, 478), Anon. (1965, p. 608-609). For Red Top Mountain, 47o 18' 05" N and 120o 45' 33W, Kittitas County, Washington, Red Top Mountain Map, USGS 7.5' x 7.5'.
2368Red Top Mountain Blue Agate, Red Top Mountain, Kittitas County, Washington. Term used by Cunningham (1959, p. 14-17) and a synonym of Ellensburg Blue Agate. See also Red Top Blue Agate.
2369Red Utah Horn Coral, Utah, a red, agatized horn coral (Pseudozaphrentoides?) of probably Pennsylvanian age. Term used in adv., Ray's Rock shop, Lapidary Journal, v. 18, no. 12, p. 1340.
2370Regenbogenachat (German), iris agate, described in Hintze (1911, p. 1472).
2371Regency Rose Agate, Idaho, a lapidary and collector term applied to pink to peach colored forms of plume agate from Graveyard Point, Idaho.
2372Regular (also mine run), fire agate grading term, Canton, P. M. (1977, p. 812-818).
2373Reservation fire Agate, Arizona, ...brilliant colors, reds, greens, purples. The advertizement stated that this kind of fire agate could be mined only by residents of the Indian Reservation on which it was found. Adv., Desert Diggers, Lapidary Journal, v. 38, no. 10, p. 1374.
2374Rhum, Inverness, Scotland, one of the Tertiary sites from which Fallick et al (1985, p. 672-674) obtained agates for their study of Oxygen isotope ratios. Rodgers described the site (1974b) and (1975, p. 52-54, 86, figs. 51-53) listed two sites on Rhum, and Macpherson (1989, p. 19, 50, fig. 111) noted that this site has been known since the late 1700's.
2375Rhum, Bloodstone Hill Beaches, Inverness, Scotland, see Rhum.
2376Rhynie Chert, a chert from the lower Old Red Sandstone of early Devonian age named for Rhynie, Scotland. It preserves the remains of many primitive plants. More information is at the Rhynie Chert Resource Page at the following URL:
2377Rhyolite Bomb, a term used for agate filled nodules (thunder eggs) by McKinley (1935, p. 20).
2378Riband agate, ...descriptive, different layers are straight or curved and/or concentric or parallel to each other and their surfaces are plane or uniformly curved Bauer (1896, p. 512), but Fraser and Fraser (1988, p.75) suggested this is an archaic term for chalcedony or jasper with strongly color contrasting layers. Shipley (1971, p. 171) suggested this term applied to agates with wide bands. See also ribbon agate.
2379Riband jasper, archaic term for banded jasper, Shipley (1971, p. 171) suggested it is the same as Riband Agate.
2380Ribbon Agate, Ill defined term, Shipley (1971, p. 171) suggested it is the same as Riband Agate, but Johnson (undated) and cited in Foord (1870, p. 64) suggested that if the agate cut in a direction parallel to the axes of the cylinder, we have a suite of more or less delicate parallel lines in which case it forms a ribbon agate as a banded agate.@ See also onyx agate.
2381Ribbon Agate, South Dakota, see Zasadil (1951, p 14-18).
2382Ribbon jasper, Shipley (1971, p. 171) suggested it is the same as Riband Agate.
2383Ribbonstone, Australia, Perry (1967, p. 80, 81) used the term generically for colorful, striped chert or flint from localities in Queensland and Northern Australia and provided colored illustrations of several examples. adv., Harry Sering Company, Rocks and Minerals, v. 48, no. 10, p. 607. Australia, ...shades of cream, pink, red, yellow, grey, orange, beige, and brown, adv., Stones and Findings of Australia, Lapidary Journal, v. 21, no. 1, p. 33. Illustrated in Feehan (1979, p. 166-174).
2384Richarson Ranch, Oregon, collecting locality in Oregon that has yielded several varieties of agate and jasper and that is mentioned in Rodgers (1976, p. 116-128).
2385Ricolite, not an agate, but a green, banded serpentine that is sometimes mistaken for agate. See Shipley (1971, p. 171)
2386Rice Agate, Nebraska, Iowa, Kansas. A term used to describe fusulinid bearing cherts that may or may not have a zone of banded agate at the interior of the nodule. This material forms regressive marine limestones of cyclic deposits described Heckel (1975) from strata of late Pennsylvanian and early Permian ages. The "rice" is made up of the tests of the fusulinid Triticites, the species differing with the various limestone units. See Rice Stone.
2387Rice Stone, term used by Barbour (1915) and Woodruff (1906) to describe late Pennsylvanian - early Permian fusulinid bearing chert. Synonym of Rice Agate.
2388Rimrock, Oregon, Tree Agate, Generally black and white adv., Walbar Jewelry Mfg. Co., The Mineralogist, v. 4, p. 15.
2389Ring Agate, cf. eyed agate with different colored bands in concentric rings, Bauer (1896, p. 512). See also eyed agate, tube agate, riband agate.
2390Ringgold Chert, for Ringgold, Catoosa County, Georgia, See Hudson (1982, p. 158-165).
2391Rio Grande Agate, Texas, for various plume, moss, lace, sagenitic, and fortification agates found in the Rio Grande River gravels of Holocene age and in terrace gravels of the Rio Grande River of Pleistocene age. Recorded deposits extend from about Laredo, Texas, southeastward to Brownsville. Similar agates probably are found in gravels and terraces to the west and northwest. Dake (1940, p. 487 and 1946, p. 50-52) probably first recorded these agates and stated that they are red, green jasp-agates and moss agates and were brought to his attention by Mr. J. E. Applewhite, who suggested they were washed into the Mc-Allen-Laredo, Texas, areas from western sources. Zeitner (1964, p. 86) stated---it had no particular name so I will call it Rio Grande agate, but later in the same article stated that ranchers called any stone "Rio Grande Agate", and that years earlier she had purchased Rio Grande agate. In the same article (p. 89) Zeitner used the term Valley Agates to describe this material. Zeitner suggested that these agates were similar to agates from the Big Bend area that are now described as Woodward Ranch, Pom-Pom, Thistle and other varieties of agate. See also Zeitner (1984, p. 268-280).
2392Rio Grande Agate, for Rio Grande River, Texas, Mexico, adv., John Chisum, Rocks and Minerals, v. 49, no. 1, p. 39. Fraser and Fraser (1988) suggested the locality as Travino Ranch, 40 miles west of Laredo, Texas, but Brad Cross (Personal Communication) suggested this material comes from nearly the entire length of the Lower Rio Grande River.
2393Rio Grande Crazy Lace Agate, see Rio Grande Agate.
2394Rio Grande jasp-agate, Texas, see Rio Grande Agate.
2395Rio Grande Jasper-Agate, Texas, no description, adv., Rockhound Museum, Lapidary Journal, v. 10, no. 2, p. 107.
2396Rio Grande Valley Agates, term used without description for agates from Texas. See Kyte, 1961, p. 114.
2397Rio Grande Valley Wood, Texas, ...refers to woods from the lower Rio Grande River and terrace gravels laid down by previous streams. See Zeitner (1964, p. 568) who recorded several varieties including both soft and hardwoods.
2398Rio Plata Agate, Uruguay, no description, adv., Lapco-Gems, Rock & Gem, v. 5, no. 5, p. 7; Lapidary Journal, v.28, no. 9, p. 1399.
2399Rio Puerco Moss Agate, New Mexico, to apricot colored, cloud-like moss...(Murphy, 1963, p. 266-270). moss from float, Morrison Formation of Jurassic age (Murphy, 1970, p. 1062-1067).
2400Ring Agate, descriptive, approximates eye agate, which see.
2401Risolite?, no locality, no description, adv., Merle's Rock Box, The Mineralogist, v. 26, no. 4,5, p. 137. This may be a mis-spelling of ricolite, a banded serpentine, that is sometimes confused with agates.
2402Rivera Lace Agate, Durango, Mexico, no description, adv., Rivera & Sons, Lapidary Journal, v., 30, no. 12, p. 2816. non Riviera Lace, which see.
2403River Road Agate, for Savannah River, Georgia, See also Hudson (1982, p. 158-165).
2404Riverside Reservoir, historic area in Oregon that reputedly produced agates that were similar to Montana moss agates. See Kathan (1951, p. 40-48).
2405Riviera Lace Agate, (=Goldum Agate), Utah, no description, adv., Greenway Slabs & Cabs, Lapidary Journal, v. 30, no. 5, p. 1238.
2406Riviera lace, golden agate, Utah, adv., Greenway Slabs & Cabs, Box 1147, 340 Wymore Road, Winter Park, Florida 32789, Rock & Gem, v. 6,no. 12, p. 94.
2407Riviera Plume Agate, Mexico, no description, adv., Greenway Slabs & Cabs, Rock & Gem, v. 6,no. 12, p. 94; Lapidary Journal, v. 30, no. 5, p. 1238.
2408Road's End Agate, in Wiley Well area, Imperial County, California, see Anon, The Mineralogist, v. 23, no. 2, p. 88. This site produced agate. Jasper and pastelite according to Strong (1971, p. 76). RoadÆs End does not appear in Geographic Names Information System.
2409Roaring Ridge, Kern County, California, Berkholz (1962, locality 8d) recorded palm wood moss agate, jasper and amygdaloidal agates from this locality. This is also an agatized wood locality recorded by Strong (1978, p. 48-51). Roaring ridge does not appear in Geographic Names Information System.
2410Roaring ridge Opal, see Cowden Fire Opal.
2411Robbins Creek Agates, banded and iris agates, local name, British Columbia, see Baker, S. G., 1960. B.C. Gem Trails, The Mineralogist, v. 28, no. 4,5, p. 66, 68. ...plume and banded agate from Robbins Creek Basalt of Tertiary? age, exposed near Kamloops, British Columbia, Clemson (1965, p. 508-512).
2412Robbins Range petrified wood, local name, British Columbia, see Baker, S. G., 1960. B.C. Gem Trails, The Mineralogist, 28, no. 4,5, p. 66, 68.
2413Robinson (Ranch) Plume Agate, Oregon, black feathery plumes, adv., Max Steevens, Lapidary Journal, v. 13, no. 6, p. 828.
2414Rochester Basin, Imperial County, California, site for agate and chalcedony. Name was used by Johnson (1971, p. 6) but this feature name does not appear in Geographic Names Information System.
2415Rocky Butte Jasper, Oregon, this is an Owyhee Jasper look-alike, but is somewhat grayed out, purchased three pounds at Richardson's Ranch in 1977, and they indicated Oregon source, RKP. Geographic Names Information System lists 11 sites in Oregon that are called Rocky Butte and data is insufficient to determine which, if any, is the site that produced this material. adv., Smokey Mtn. Rock Shop, Lapidary Journal, v. 29, no. 3, p. 601; color illustration in adv., Harry Sering Co., Lapidary Journal, v. 32, no. 3, p. 678-679.
2416Rocky Butte picture jasper, see also Rocky Butte jasper, Oregon, ...hills, valleys, mountains, trees, etc., ...adv., Goodnow Gems U.S.A., Lapidary Journal, v. 30, no. 10, p. 2251.
2417Rock of St. Skae, Angus, Scotland, historic locality that produced agates from lavas of lower Old Red Sandstone of early Devonian age and first recorded by Heddle (1901, p. 76). The site is also listed by Rodgers (1975, p. 84) and Macphersor (1989, p. 19).
2418Rodeo Agate, purple banded vein agate, Mexico, 1/2" to 1" thick, ...adv., Gorin's Gemarts & Rocks, 3315 Tyler Ave., El Paso, Texas, Lapidary Journal, v, 15, no. 1, p. 65.
2419Rodeo Banded Purple Agate, New Mexico, a vein agate, adv., Gorin's Gemarts, Lapidary Journal, v. 14, no. 5, p. 446.
2420Rodeo Purple Banded Vein Agate, Mexico, purple, 1/2" to 1" thick, adv., Gorin's Gemarts & Rocks, Lapidary Journal, v. 15, no. 1, p. 65. This may be the same as Royal Purple Aztec Agate, which see.
2421Rodeo Roses agate, Mexico, no description, adv., Rivera & Sons, Lapidary Journal, v. 31, no. 4, p. 1015. Fraser and Fraser (1988, p. 76) suggested this may be a synonym of flower garden agate.
2422Rodeo royal agate (=royal purple Aztec agate?), Mexico, adv., LoMa Lapidary, Lapidary Journal, v. 16, no. 6, p. 601
2423Roger Mountain Wood, Oregon, no description, Rodgers (1971, p. 588-591). This may be from Rogers Mountain, 44o 41' 10" N and 122o 43' 48" W, Linn County. Orthography uncertain, see Rogers Mountain Wood, below.
2424Rogers Mountain Wood, Oregon, see Roger Mountain Wood, above.
2425Rogueite, Medford, Oregon, area. adv., Southern Oregon Mineral Exchange, The Mineralogist, 4, no. 9, p. 30. Dake, Fleener, and Wilson , (1938, p. 153) called it a greenish colored jasper found in the Rogue River, Oregon.
2426Rogue River Pattern Agates, Rogue River, Oregon, adv., Enos F. Hayward, The Mineralogist, v. 4, no. 7, p. 28.
2427Rohrenachate, German, tube agate, many localities, generic term, used by Hintze (1915, p. 1472).
2428Rohrenbildung, German, tube or tube-like structures in agate. Hintze (1915, p. 1472) used the term Rohrenachate and Gaertner (1971, p. 36, 37) used the term Rohrenbildung in preference to Rohrenachate.
2429Rome, Oregon, locality in Malheur County, mentioned by Rodgers (1976, p. 116-128).
2430Rooster Tail Agate, Durango, Mexico, no description, adv., Lovelace Rock & Mineral Shop, Lapidary Journal, v. 27, no. 1, p. 203. Rivera & Sons, Lapidary Journal, v. 30, no. 12, p. 2816. Probably the same material as Pata de Gallo agate?
2431Rose Agate, source unknown, adv., Rubey's Rocks, Earth Science, v. 16, no. 3, p. 143.
2432Rose banded agate, Texas, (=Texas Rose Agate?), no further details, adv., Frank Duncan & Daughter, The Mineralogist, 15, no. 7, p. 370.
2433Rosebud agate, Oklahoma, red, green, and white, mossy agate, Slack and Kennedy (1968, p.898-906). Fraser and Fraser (1988, p. 76) suggested this may be agate after barite pseudomorphs. locality, no description, adv., Charles Weidinger, Lapidary Journal, v. 7, no. 4, p. 311.
2434Rose-eye Jasper, no locality, àrich red in an orange orbicular and webbed pattern, adv., Southwest Rock & Gem, Lapidary Journal, v. 44, no. 12, p. 109.
2435Rose Garden Agate, Colorado, ...circular patterns, Name appears in 1954 catalogue for Gem Exchange (Gem Village), Bayfield, Colorado, p. 4.
2436Rose Stone, California, a rose-pink chalcedony?, no details, Robert O. Buck, The Mineralogist, v. 17, no. 11, p. 526; ...rose-pink, lavenders of agate, adv., Robert O. Buck, Lapidary Journal, v. 3, no. 1, p. 67.
2437Rosetta Crazy Lace Agate, Mexico, àmostly reds and grays, adv., Southwest Rock & Gem, Lapidary Journal, v. 45, no. 6, p. 150. (cf. entry below)
2438Rosetta Lace Agate, Mexico, gold, red, white, adv., adv., Fire Mountain Gems, Lapidary Journal, v. 32, no. 10, p. 2142-2143. ...Mexico, red, white, gold, adv., Goodnow's Gems U.S.A., Lapidary Journal, v. 32, no. 12, p.2582.
2439Rosette Lace, Mexico?, no description, adv., Artrox, Lapidary Journal, v. 22, no. 9, p. 1217.
2440Rossie Ochil, Perthshire, Scotland, ...carnelian-red, with gray (Heddle, 1901, p. 76); site in lavas of lower Old Red Sandstone of early Devonian age. The site is also mentioned by Macpherson (1989, p. 19).
2441Rossjewel, trade name for a precious chalcedony from a mine in Riverside County, California, owned by Frank Ross, Blythe, California, and reported by Murdoch and Webb (1966, p. 317)
2442Ross of Mull, see Isle of Mull.
2443Rouge Blanco, Oregon, check spelling, Chuck and Rocky, Room 201 Broadway Arcade Building, 542 South Broadway, Los Angeles, California. xx
2444Rough Black Opal, Australia?, no description, adv., Australian Gem Trading Co., Lapidary Journal, v. 33, no. 12, p. 2505. xx
2445Round Mountain Fire Agate, for Round Mountain, in the vicinity of NW 1/4 sec. 29 and NE 1/4, sec. 30, T. 10 S., R. 32 E., Greenlee County, Arizona, Round Mountain Quadrangle, U. S. Geological Survey, 7.5 Minute Series , no. Topographic)
2446Royal, fire agate grading term, Canton, P. M. (1977, p. 812-818).
2447Royal Aztec Agate, Mexico, banded purple, adv., Gems by George, Lapidary Journal, v. 15, no. 4, p. 463.
2448Royal Aztec Amethyst Lace Agate, Mexico, no description, may be same as Royal Aztec Purple Agate, ...adv., Goodnow Gems U. S. A., Rock & Gem, v. 3, no. 1, p. 3.
2449Royal Aztec Lace Agate = Royal Aztec Purple Agate, adv., Goodnow Gems 3415 Hayden St., Amarillo, Texas 79109, Lapidary Journal, v. 29, no. 3, p. 555.
2450Royal Aztec Purple Banded Agate, Mexico, no description, adv., Southern Gem Mining Company, Lapidary Journal, v. 15, no. 4, p. 4339.
2451Royal Flower Agate, Arizona,, feathers, plumes, blooms, bushes, shrubs, with after-frost effect, adv., Arizona Agate Mines, The Mineralogist, v. 17, no. 9, p. 429; Lapidary Journal, v. , no. 1, p. 95; v. 3, no. 4, p. 285.
2452Royal Purple Agate, California, trade name? ...from our own mines. Adv., Condo's Rock Shop, Lapidary Journal, v. 15, no. 5, p. 539.
2453Royal Purple Agate = Royal Aztec Purple? adv., A &S Gem & Mineral Co., Rocks and Minerals, v. 41, no. 2, p. 133
2454Royal Purple Aztec Agate, bright purple vein agate from near Rodeo, Durango, Mexico. Also known as Rodeo Royal Aztec Agate, Royal Aztec Agate, and Royal Aztec Purple Agate. Fraser and Fraser (1988) suggested that it was found to the east end of Gallego Ranch, Chihuahua, Mexico, and this idea was perpetuated by unauthorized use of the trade name. They also suggested that this is a registered trade name, but did not state the trade mark owners (possibly American Producers in Durango, Durango, rkp). Cross (1996, p. 89, p. 89, 90) also stated this is a registered trade name, but clarified the type area as being near Equeda, south of Rodeo, Durango, Mexico. Several variations on the name suggest that miners of similar agate from other sources were cashing in on the popularity of this material.
2455Royal Purple Lace, Mex., adv., Indiana Lapidary Supplies, Rocks and Minerals, v. 37, no. 3,4, p. 219 may be synonym of Aztec Purple
2456Ruby jasper, Arizona, no description, adv., Fred Stein, Lapidary Journal, v. 3, no. 6, p. 442.
2457Ruby Lace Jasper, California, a red jasper and jasp-agate with blue and white stringers according to Strong (1971, p. 71) that was found at Wall Canyon. The name Wall canyon does not appear in Geographic Names Information System and the locality may be Wall Street Canyon, which see? Further details needed.
2458Ruin Agate, descriptive term. Farrington (1927, pl. IV) illustrated a ruin agate in which there is considerable displacement and offsetting of bands, whereas Zeitner (1964, p. 349) suggested the term ruin agate be used only for materials in which the agate was shattered but the fragments were not displaced from their original position before being recemented. This would be a jointed agate rather than a faulted agate. See also brecciated agate. The illustrated example shows the ruination took place only at the interior of the agate suggesting the shattering is due to some force other than faulting.
2459Ruin jasper, synonym of brecciated jasper?
2460Ruinenachate (German), ruin agate; see Hintze (1915, p. 1472).
2461Runion Agate Mines, Warren County, Virginia, source of brown to black plume agate with plumes of romanechite, BaMn+2MnO 8+4O16(OH) 4. This agate was discovered in the early 1960's and marketed more or less locally; it probably comes from rocks of Precambrian and Cambrian age. Some early sources have referred to this as Plum Agate and it is so listed in the catalogue of publications form the Virginia Division of Mineral Resources.

About the Agate Lexicon

The Agate Lexicon and glossary of amorphous and cryptocrystalline silica gems have been designed to be used in conjunction with the Agate Bibliography, which was compiled to be used by researchers, hobbyists, historians, lapidaries and other individuals which have an interest in these stones. Numerous localities are listed here but this does not imply that the sites are available for collectors or collecting. Many of the sites are historic, depleted, are on private property or are protected by legal leases or claims and some are now on protected sites such as parks, nature preserves, or historic areas. Wherever possible, stratigraphic details are listed, but the user must always refer back to the original citations. Map information has been derived from 7.5' x 7.5' topographic maps issued by the U.S. Geological Survey (USGS) and latitude and longitude have been derived mostly from Geographic Names Information System of the USGS.

Authors should not cite the Agate Bibliography or Agate Lexicon as a source in their published or unpublished works but should cite only those publications listed therein.

Named varieties of agates, jaspers, etc., have created special problems for both scientific researchers and historians. We have recognized at least two different usages of names. Some names appear to have geologic / historic validity, as they were described along with the lithology / geography of a region. Some names were introduced simply as trade names to boost sales of gem dealers. In the former case, the name will be followed by appropriate literary citation as to who first used the name and in what context. In the latter case, an advertisement (abbreviated adv.) is the first published record or public notice. We have tried to find the earliest citation in either case and the user should keep in mind that older citations unknown to us may exist. Advertisements are not cited to generate business but to simply give a historic source; many of the firms appearing in the citations are indeed no longer in existence.

Cited materials are generally only from accessible sources such as professional journals, magazines, hobbyist journals, open file reports of government agencies, newspapers, etc. Bulletins issued by local clubs and societies are generally not cited with the exception of those special publications that were actually made for public distribution.

Wherever possible, imagery of one or more specimens of named agate varieties, structures, patterns, etc. are provided. Images have been provided by several sources and are not to be utilized in other pages without the consent of the image owner.