| ID | Agate |
|---|---|
| 878 | Dallasite, for Dallas Avenue (Road?), Vancouver, B.C., Canada. Local name for a green and white jasper. Marshall, J. S., 1944, British Columbia - Gem Notes. The Mineralogist, v. 12, no. 6, p. 184, 186, 188, 189. Hutchinson and Hutchinson (1970, p. 376-379) suggested that dallasite is a silicified pillow basalt ...usually green angular fragment in a silica body. Pillow basalts form when lava flows under water and the outer, cooled and solidified crust breaks up and is reworked into the lava melt. |
| 879 | Damsonite, trade name, a purple, opaque chalcedony from central Arizona that was marketed by J. Bergman, Las Vegas, Nevada. Shigley (1985, p. 219) called the material an amethystine chalcedony. See also Facets column in Lapidary Journal, v. 40, no. 2, p. 5. |
| 880 | Danbury, North Carolina, agate collecting locality listed by Zeitner (1968, p. 1212-1226, 1230). |
| 881 | Danby (opalite) for Danby, California, locality in approximate SW 1/4, sec. 11, T. 5 N., R. 15 E., San Bernardino County, California, Cadiz Summit Quadrangle, U. S. Geological Survey, 7.5 minute series (Topographic) See Mitchell (1986, p. 37, 38). |
| 882 | Dangar's Gully, near Nundle, New South Wales, Australia, historic chalcedony locality recorded by Benson (1913, p. 662 - 724). |
| 883 | Daolite, trade name, no locality, may not be an agate or jasper. A picture rock that is similar to Biggs Jasper and is sold only as mounted, finished stones by J. W. Day Manufacturing Co., Product News, Lapidary Journal, v. 40, no. 7, p. 60. |
| 884 | Dark Joshua or Agave (wood), California, no description, Foster's Rock Shop, Lapidary Journal, v. 19, no. 1, p. 122. |
| 885 | Darrell's Agate, Oregon, NFI, name appears in postings of Terry Ensell to rocks-and-fossils. |
| 886 | Day and Night Agate, Mexico, ...black & white lace, adv., Goodnow Gems U.S.A., Rock & Gem, v. 4, no. 6, p. 3. Cross (1996, p. 73) indicated that this was a lace agate with black and white alternating bands. |
| 887 | Dead Geyser Agate, Wyoming? described as being agate fragments found around necks of dead geysers; some iris, adv., Allan Branham, The Mineralogist, v. 14, no. 9, p. 469. |
| 888 | Deadman Creek (agate, wood, opal, jasper), local name, for Deadman Creek, British Columbia, see Baker, S. G.,1960. B.C. Gem Trails. The Mineralogist, v. 28, no. 4,5, p. 66, 68. |
| 889 | Deadman's Wash, Arizona, no description, Getsinger (1961, p. 318). |
| 890 | Death Valley Agate, California, usually jasp-agates with red, yellow plumes or red and yellow poppies (pisolites?), ... adv., Death Valley Agate Mines, The Mineralogist, v. 22, no. 1, p. 25; A. Hugh Dial, Lapidary Journal Rock Hound Buyer's Guide, 1954?, p. 93. Similar names may have appeared under names such as Death Valley Plume and Wingate Pass Agate, etc. |
| 891 | Death Valley Golden jasper, see Death Valley jasper, ...term used in adv., Murray American Corporation, Lapidary Journal, v. 31, no. 1, p. 76-77. |
| 892 | Death Valley jasper, generic term for jasper from Death Valley region?, California, Nevada. This term appears in advertizements from: Murray American Corporation, Lapidary Journal, v. 29, no. 12, p. 2258; Fire Mountain Gems, Lapidary Journal, v. 30, no. 8, p.1911. |
| 893 | Death Valley Jet Black, California, no description or location, adv., Murray American Corp., Rock & Gem, v. 6, no. 10, p. 59; Lapidary Journal, v. 29, no. 12, p. 2258. |
| 894 | Death Valley Plume (agate?), California? no description, adv., San Fernando Valley Gem Co., Inc., Lapidary Journal, v. 18, no. 11, p. 1224....no location, ...bright colors, Name appears in 1954 catalogue for Gem Exchange (Gem Village), p. 3. ...no description, Anon, 1978, p. 1139 (Lapidary Journal) |
| 895 | Death Valley Nodules, no locality, no description, adv., Erwin Tonne, Lapidary Journal, v. 1, no. 3, p. 145; Scott's Rose Quartz Company, Rocks and Minerals v. 29, no. 5,6, p. 308 |
| 896 | Deep Creek Agate, Wood, California, local name, probably named for Deep Creek, about 7 miles southwest of Cedarville, Modoc County, California. See Johnson (1971, p. 50). |
| 897 | Deep Purple Crazy Lace, Durango, Mexico, adv., American Producers, Rocks and Minerals, v. 39, no. 5,6, p. 307. |
| 898 | Deer Creek Fire Agate, Arizona, ...reds, yellows, greens, blues, adv., Deer Creek Fire Agate Mining Co., Rock & Gem, v. 4, no. 7, p. 27. This may not be first appearance of name. See also Canton, P. M. (1977, p. 812-818). |
| 899 | Deer Creek Chrysoprase, California, probably a local name for an area southeast of Porterville, Tulare County, California, according to Johnson (1971, p. 31). |
| 900 | De Gallo agate, Mexico, misnomer for Pato de Gallo, no description, adv., Flintstones Gems and Minerals, Lapidary Journal, v. 28, no. 6, p. 994. |
| 901 | Delaney Rim Agate, see Delaney's Rim Agate. |
| 902 | Delaney's Rim Agate, Wyoming, ...white and black, tan and brown, black and brown agate with oolites, Mansell (1972, p. 890-902). For Delaney Rim, 41o 34' 53" N and 108o 10' 53" W, Sweetwater County, Wyoming. See Hodges (1971, p. 1360-1364). |
| 903 | Del Norte Plume Agate, for Del Norte, Colorado, thunder egg agates with generally golden to orange-yellow plumes, and sometimes sagenitic inclusions in colorless, banded matrix. Most material from W 1/2, SW 1/4 sec. 29, and E 1/2 SE 1/4 and NE 1/4 sec. 30, T. 41 N., R. 5 E., Saguache County, Colorado. Pearl, 1958, p. 52-53, 1972; pp. 59-61; Towner (1969, p. 1286-1291). See also Roots (1952, p. 234-236). |
| 904 | Deming Agate, for Deming, New Mexico, generally thunder eggs, see Murphy (1961, p. 266-270). Murphy (1963, p. 98) described this as vein and nodular agate with fortification, moss, dendritic, and orbicular patterns. New Mexico, no description, adv., Louis & Mary Woolman, Lapidary Journal, v. 11, no. 1, p. 89. ...red moss, yellow moss, fortification or flame, adv., Gems by George, Lapidary Journal, v. 16, no. 7, p. 701. ...banded agate with black, brown, yellow, adv., Wright's Rock Shop, Lapidary Journal, v.31, no. 2, p. 594. |
| 905 | Deming Blue Agate, New Mexico, no description, Charles Gem Center, Lapidary Journal, v. 24, no. 9, p. 1246. |
| 906 | Deming Fortification Agate, New Mexico, ...colorful, adv., Deming Agate Shop, Lapidary Journal, v. 4, no. 1, p. 51. |
| 907 | Deming Thunder Eggs, New Mexico, term used by Zeitner (1971, p. 286-289). Probably a synonym of Deming Agate, above. |
| 908 | Deming Vein Agate, adv., Zweifel International Prospectors, Rocks and Minerals, v. 44, no. 8, p. 581. ...swirls and moss, adv., Zweifel International Prospectors, Lapidary Journal, v. 22, no. 8, p. 1056. |
| 909 | Dendrachat, (German) dendritic agate, ...einen weissen und grauen Chalcedon mit Abranu- und moosformigen Zeichnugen.@ See Hintze (1915, p. 1472, 1473) for more detailed etymology. |
| 910 | Dendrachates (Latin) according to Quick (1963, p. 6), Frazier and Frazier (1988, p. 72) and others, a term used by Pliny and tranlated (transliterated?, mine) as moss agate or dendritic agate. |
| 911 | Dendritenachat, (German) dendritic agate (Gaertner, 1971, p. 26, 27. |
| 912 | Dendritenbildung, German, loosely translated as dendrite buildings, staining patterns that resemble mesas or ruins of buildings and are most commonly seen in Carazinho Agates from Brazil and appear to be chromatographs of various minerals that form dendrites. See Gaertner (1971, p. 52, 53). |
| 913 | Dendritic agate, descriptive term for tree- or bush-like inclusions; they are commonly seen in Montana Agate. |
| 914 | Dendritic Agate, Alamo Dam, Arizona. Dendritic agate found in NE 1/4, sec. 13, T. 10 N., R. 14 W., and in NE 1/4, sec. 18, and SE 1/4 sec. 17, T. 10 N. R. 13 W., La Paz County, Arizona, along south side of Bill Williams River, Reid Valley Quadrangle, U. S. Geological Survey, 7.5 Minute Series (Topographic). See also Alamo Dam Quadrangle. |
| 915 | Dendritic Agate, Mexico, adv., Al Arnold, Rocks and Minerals, v. 52, no. 6, p. 262. |
| 916 | Dendritic Blue Opalite, Queensland?, Australia, ...blue, fern-like dendritic markings on white background. ...adv., Stones and Findings of Australia, Lapidary Journal, v. 21, no. 1, p. 33. |
| 917 | Dendritic Jasper, Kansas, no description, Name appears in 1954 catalogue for Gem Exchange (Gem Village), p 5. This may the same as the dendritic opal that is often found in the Ogalalla Formation of Pliocene Age that is exposed in much of Wyoming, Colorado, Nebraska, and Kansas. |
| 918 | Dendritic Manganese Agate, no further details, adv., Allan Branham, Box 562, Lander, Wyoming, The Mineralogist, v. 14, no. 9, p. 469. |
| 919 | Dendritic Opal, descriptive term. The term has often been used to describe material found in the Ogallala Formation of Pliocene age that crops out in parts of South Dakota, Nebraska, Wyoming, Kansas, and Colorado. Also called Dendritic Opalite by Zeitner, 1960, p. 58-62. |
| 920 | Dendritic Opalite, Kansas, Zeitner, J. C., 1960. Rare gems of the Midwest, Earth Science, v. 13, no. 2, p. 58-62. |
| 921 | Dendritic Opalized Agate, Australia, golden agate with fancy black lacing, adv., Parser, Lapidary Journal, v. 38, no. 5, p. 657. |
| 922 | Derramadero Agate, for Rancho Derramadero, Chihuahua, Mexico. Nodular agates mined from Rancho El Agate Andesite at 29o 49' 02" N and 106o 14' 36" W, Chihuahua, Mexico (Cross, 1996, p. 46, 48). This material may be the same as Coyamito Agate, based on colors and inclusions. |
| 923 | Deschutes Canyon Jasper,Oregon, illustrated, Novinger (1969, p. 1530-1536). |
| 924 | Deschutes Canyon Thunder Eggs, for Deschutes River Canyon, Wasco County, Oregon. adv., Barnetts Gem Shop, The Mineralogist, v. 4, no. 1, p. 39. . See also Rodgers, 1976, p. 116-128). |
| 925 | Deschutes Nodules, Deschutes Canyon, Wasco County, Oregon, adv., V.D. Hill, The Mineralogist, v. 5, no. 11, p. 21 |
| 926 | Desert agate, multiple localities, California, Utah, southwest United States, the name is commonly used especially in advertizements, e.g., Grieger's, 1633 E. Walnut, Pasadena, Calif., Lapidary Journal, v. 19, no. 1, p. 212. |
| 927 | Desert Center, California, plume, sagenitic, banded, and lace agate, Perry (1961, p. 312). |
| 928 | Desert Dog Mines, Oregon, ... thunder eggs, jasper, opal, is used in U.S. Bureau of Mines directory of gemstone producers (Austin and Copeland, 1995, p. 43). |
| 929 | Desert Nodule, Garfield County, Utah, ...a term used to describe transparent moss agates and red jasp-agates by Garfield Information Center Panguitch, Utah, 84759, to promote tourism and rock collecting in that area, Lapidary Journal,v.31, no. 1, p. 179. |
| 930 | Desert Oasis Gem field, California, site for agate and jasper listed by Berkholz (1962, locality 13) and Strong (1971, p. 52) that produced agate and jasper. Desert Oasis does not appear in Geographic Names Information System. |
| 931 | Desert picture rock, ...no locality, no description, adv., Ajax Minerals, Rock & Gem, v. 5, no. 12, p. 97. |
| 932 | Desert Rose Agate, Texas, coated, fine interior agate, adv., Gault, Lapidary Journal, v. 3, no. 1, p. 64. |
| 933 | Desert Rose Carnelian Agate, Arizona?, no description, adv., Fred Stein, Lapidary Journal, v. 3, no. 6, p. 442. |
| 934 | Desert Rose Chalcedony, ... no locality, no description, adv., Berryhill's, Lapidary Journal, v. 12, no. 6, p. 797. |
| 935 | Desert Scenes, no locality, no description, adv., Prof's Rock Shop, Lapidary Journal, v. 32, no. 2, p.519 |
| 936 | Desert Scenic (Agate?), New Mexico, no description, Name appears in 1954 catalogue for Gem Exchange (Gem Village), Bayfield, Colorado, p. 6. |
| 937 | Desert Scenic Stone, no locality, no description, adv., Keweenaw Agate Shop, The Mineralogist, v. 18, no. 2, p. 75. |
| 938 | Desert Wonder Agate, Eastern Oregon, adv., Swenson's Nodule Shop, The Mineralogist, v. 7, no. 6, p. 243. |
| 939 | Deuel County Wood, Nebraska, local name, agatized wood that probably formed in continental rocks of Cretaceous age from sites in Colorado, but has been transported into Nebraska by streams and is found especially in terrace gravels of late Pliocene and Pleistocene age and in gravels of Holocene and Recent streams of the South Platte River and Lodgepole Creek drainages. This may be the same material as the Parker Wood of Colorado. See Pabian (1971) and Zeitner (1978, p. 2100-2110). |
| 940 | Deutsche Jaspis, (German), German Jasper, Frazier and Frazier (1989) suggested that this term was used for jasper that is dyed blue and used as a substitute for lapis lazuli. Shipley (1971, p. 84) used the term German Lapis@ for blue dyed jasper and suggested the proper name for this stone is Swiss Lapis.@ Hintze (1915, p. 1476-1486) listed numerous jasper producing localities in Germany and the name may be generic as a result. |
| 941 | Dew Drop Road agate?, local name, British Columbia, see Baker, S. G., 1960. B. C. Gem Trails. The Mineralogist, v. 28, no. 4,5, p. 66, 68. |
| 942 | Dianoche Agate, Mexico, black and white lace, adv., Gem Center U.S.A., Lapidary Journal, v. 18, no. 1, p. 131. Synonym of Day and Night Agate. |
| 943 | Diaspro, Italian, patterned jasper, see MacFall (1976, p. 2042-2056). |
| 944 | Diaspro lineato dell=Arno, Tuscany, Italy, literally, lined jasper from the Arno (River). Rossi and Procacci (1984, p. 72, fig. 8) illustrated this material and they suggested that it came in several colors. MacFall (1976, p. 2042-2056) referred to this material simply as Arno Jasper. |
| 945 | Dinny Bone, Colorado, Utah, Zeitner (1964, p. 345) used this term for agatized dinosaur bone, mostly from the Morrison Formation of Jurassic Age, from outcrops extending from eastern Colorado to eastern Utah, with principal sites being in Moffatt County, Colorado, and Uinta, Grand, and Emery counties, Utah. Zeitner also suggested that the most appealing material has cells filled with banded and fortification agate, and that bone of whale and other large vertebrates may become agatized. See also Talbot, v., 1978, p. 1260-1262. |
| 946 | Dinosaur Bone, Colorado, Utah, agatized dinosaur bone from Morrison Formation of Jurassic age exposed in Northeastern Utah and Northwestern Colorado; color illustration, adv., Harry Sering Co., Lapidary Journal, v. 32, no. 3, p. 678-679. See Talbot (1978, p. 1260-1262). |
| 947 | Dinosaur Eggs, Utah, red, pink, yellow chert nodules (with Liesegang bands?), Short Creek Road, near Hurricane, Utah, Hubert (1958, p. 38). |
| 948 | Disaster Peak picture jasper, Nevada, a popular picture jasper from northern Nevada, ...probably named for Disaster Peak, 41o 57' 34" N and 118o 11' 36" W, Humboldt County, Nevada, Disaster Peak Map, U.S. Geological Survey 7.5' x 7.5'. adv., Murray American Corp., Rock & Gem, v. 6, no. 10, p. 59; Lapidary Journal, v. 30, no. 7, p. 1619. |
| 949 | Discachatae, or Disc-bearing Agate, Heddle (1901, p. 70) suggested disc-like inclusions formed when the amounts of the various components of the agate exceed certain limitations, there is a concretionary separation of the component in the smaller amount. When these concretions are confined to a single layer, a milky-white, usually opaque disc is the product. |
| 950 | Disc-bearing Agate, see discachatae. |
| 951 | Diskachat, German, see discachatae of disc-bearing agate. |
| 952 | Docina Agate, Mexico, ...black, white and clear agate topped with quarts crystals, adv., Gems by George, Lapidary Journal, v. 16, no. 4, p. 434. |
| 953 | Dog's head agate, Durango, Mexico, term applied by Parliman (1960, p. 4, 5) to describe agates from Durango, Mexico. |
| 954 | Dogtooth Lace Agate, Chihuahua, Mexico. A variety of Crazy Lace Agate in which calcite scalenohedrons have been replaced with agate. The agate is described by Cross (1996, p. 73). Dogtooth Lace Agate is generally very colorful with contrasting bands of red, white, and clear agate. Dog toothed lace agate, Mexico. Lace agate with pseudomorphs of agate generally after calcite scalenohedrons |
| 955 | Dog Rock, British Columbia, Canada, a silicified, very fine grained volcanic from the Hozameen Group of Late Paleozoic Age, Hutchinson and Hutchinson (1966, p.508-513). |
| 956 | Dolomitic Jasper, Brazil, adv., Goodnow Gems U.S.A., ... red & white stripes, Rocks and Minerals, v. 47, no. 4, p. 233; Rock & Gem, v. 2, no. 3, pl 22. |
| 957 | Dolsky Potok stream, Czechoslovakia, locality listed by Skalicky (1978, p. 1616-1618). |
| 958 | Donnybrook Thunder Eggs, Oregon, for Donnybrook, 44o 45' 16" N and 120o 39' 00" W, Jefferson County, Oregon, Donnybrook Map, U.S. Geological Survey, 7.5' x 7.5'. ...adv., Barnetts Gem Shop, The Mineralogist, v. 4, no. 1, p. 39. |
| 959 | Donnerei, German, thunder egg, Gaertner (1971, p. 34, 35) illustrated a specimen that appears to be a Pony Butte Thunder Egg from Oregon, that he called Donnerei. |
| 960 | Doon Doon Thunder Eggs, Australia, local name for a kind of thunder egg found in the area between Mount Tamborine and Tweed River, Australia, Cadle (1972, p. 1039) and Feehan (1979, p. 166-174). Bryan (1963, p. 141-149) described expanded spherulites (thunder eggs) from here and suggested that they formed in a three phase crystallization model: (1) lining of void with chalcedony from residual silica, (2) expansion of cavity and deposition of platy chalcedony, and (3) introduction of chalcedony from outside sources. |
| 961 | Dot Agate, Texas, red and yellow dots. Zeitner (1964, p. 350) stated that this name was sometimes used, but not locally in the Big Bend area of west Texas. The dots may be either oolites or pisolites. |
| 962 | Douglas Mountain Jasper, varicolored jaspers that originated in the Morgan Formation of Pennsylvanian age and have been reworked into gravels of the Brown's Peak Formation of Miocene-Pliocene Age. It is similar to Cross Mountain Jasper of Barb (1958, p. 201) and probably the same material. Named for Douglas Mountain that extends from 40o 32' 07" N to 40o 37' 59" N and from 108o 29' 03" W to 108o 51' 32" W, Moffat County, Colorado, Lone Mountain and Jack Springs Quadrangles, U. S. Geological Survey, 7.5 Minute Series (Topographic). |
| 963 | Doubravice, Czechoslovakia, locality listed by Skalicky (1978, p. 1616-1618). |
| 964 | Dover, England, Flint, see Shepherd (1972) for a detailed treatment of flints from Great Britain. Name appears in adv., Mineral Miracles, The Mineralogist, v. 13, no. 7, p. 264. |
| 965 | Drummond's Agate Beds, Oregon, fee locality near Lebanon, Oregon, mentioned by McMackin (1978d, p. 2062-2068). |
| 966 | Drummond's Carnelian, Oregon, term used by Broughton (1974) to describe carnelian agate from the Drummond Mines near Lebanon, Oregon. adv.; see also Anon. (1978, p. 243). |
| 967 | Drummond's Jasper, adv., ibid. |
| 968 | Drusy Agate, Oregon, no description, adv., E. A. Southwick, The Mineralogist, v. 4, no. 10, p. 28. |
| 969 | Dry Creek Nodules, no locality, no description, adv., Wildhorse Rock Shop, Lapidary Journal, v. 41, no. 10, p. 110. |
| 970 | Dry Creek Thundereggs, Oregon, no description, adv., Herbert Wm. Lawson, Lapidary Journal, v. 5, no. 1, p. 41; see Zeitner (1979, p. 1260-1272). Geographic Names Information System lists 127 entries for Dry Creek in Oregon. About 12 of these entries are possible type areas. |
| 971 | Dry Falls, Kern County, California, site recorded by Berkholz (1962, locality 8) and Strong (1971, p. 19-20) that produced agate. The name Dry Falls does not appear in Geographic Names Information System. This is probably part of the El Paso Mountain complex of agate producing areas. See also Roaring Ridge. |
| 972 | Dry Head Agate, Montana, for Dry Head Creek, that extends from 45o 11' 18" N to 45o 14' 24" N and 108o 08' 03" W to 108o 25' 48" W, Big Horn and Carbon counties, Montana, Dead Indian Hill, East Pryor Mountain, and Big Ice Cave Quadrangles, U. S. Geological Survey, 7.5 Minute Series (Topographic). A marine sedimentary agate found in the Phosphoria Formation of Permian Age in the Pryor Mountains. They have also been collected along Dry Head Creek and along the Bighorn River northeast of Lovell, according to Wilson (1965). ...colorful fortification agate with swirls, eyes, curved lines...in alternating red pink, yellow, white or brown. Adv., The Breitweisers, Lapidary Journal, v. 15, no. 1, p. 153. ...agates in easterns source are reds, oranges or yellows and those in western source are dark gray and white (Steege, 1961, p. 7). ...red-brown, orange-brown, red, salmon, pink, white, as shown in color illustrations, adv., Santiam Lapidary, Lapidary Journal, v. 34, no. 6, 1253. Two spellings, Dryhead and Dry Head have been observed; the earliest used has not yet been established but Geographic Names Information System shows the latter in use on topographic maps and no alternate spellings are suggested. |
| 973 | Dry Head Fortification Agate (=Dry Head Agate) |
| 974 | Dry Lake Wood, California, Berkholz (1964, locality 4) See Boron Dry Lake Wood. |
| 975 | Dry Lakes Agates, Wyoming, a term used by Love (1970, p. 128) to describe agates from the Split Rock Formation of Miocene Age in the Granite Mountain area of Central Wyoming. They are similar to Agate Flats (Wyoming) Agates except they have not been transport tumbled or wind eroded. They are probably the same as Sweetwater Agates. |
| 976 | Dry Lake Wood Diggings, California, see Boron Dry Lakes. |
| 977 | DuBois Green and Gray Moss Agate, DuBois, Wyoming, area, adv., Allan Branham, Laramie, Wyoming, The Mineralogist, v. 10, no. 9, p. 289. |
| 978 | DuBois Limb Casts (=Wiggins Fork Limb Casts), Wyoming. |
| 979 | Duck Lake, California, no description, term used by Anon., (1978, p. 772-773). |
| 980 | Duck Rock, Utah, yellow, red, brown, silica cemented, banded material may be a jasper or flint, see Hubert (1958, p. 38-42). |
| 981 | Dugway Geodes, for Dugway, Juab County, Utah, Thunder eggs with usually blue gray to grayish banded agate surrounding a hollow interior. Adv., A. L. Inglesby, The Mineralogist, v. 22, no. 4, p. 173. See also Zeitner (1968, p. 1216), Simpson (1975, p. 24, 25) and Stewart (1960, p. 20) |
| 982 | Dulcoate agate, Fraser (1988, p. 72): "...Duluth, Minnesota, local name for Lake Superior agate. |
| 983 | Dulcote Agate, for Dulcote, Great Britain. Marine sedimentary agates from conglomerates or marls of Keuper (late Triassic age) according to O'Donoghue (1987, p. 56, 57) who gave a very good account of these agates, or from dolomitic conglomerates of Carboniferous age exposed near Bristol, Somerset. See also Potato Stones. Lapidary Journal, September, 1977, p. 1290; generally orange red agate with white bands, as shown in illustration in adv., Wesex Impex Estate, Lapidary Journal, v. 30, no. 10, p. 2277. See Van Moppes, M. (1977, p. 1290-1294). His descriptions have color illustrations and sections suggest these are agates from marine sedimentary environments. |
| 984 | Duluth, sub-variety of Lake Superior Agate, Minnesota, adv., Gem Exchange, The Mineralogist, v. 7, no. 2, p. 59; Hobbies, v. 43, no. 4, p. 104. |
| 985 | Duluth Agate, Minnesota, synonym for Lake Superior Agate. Name appears in 1954 catalogue for Gem Exchange (Gem Village), Bayfield, Colorado, p. 5. |
| 986 | Dulzura Jasper, California, red, yellow, ribbed, described by Kunz (1905, p. 1345, 1347). There are five California sites with the name Dulzura and the type locality has not be determined from from the available data as of 8/30/99, rkp. |
| 987 | Dunbar, Scotland, historic locality for amygdaloidal agates from lavas in the Old Red Sandstone of Early Devonian Age first recorded by Heddle (1901, p. 76, from Haddington). The site has subsequently been recorded by Rodgers (1975, p. 85) and Macpherson (1989, p. 19). |
| 988 | Dunbog, Scotland, classic agate locality in Fifeshire that has yielded amygdaloidal agates from lavas of the Old Red Sandstone of Early Devonian Age (Fallick et al, 1985, p. 672-674). The site is reported in Rodgers (1975, p. 86) who listed the site as Dunbog Railway Cutting. Macpherson (1989, p. 19, 41, cover photo, fig. 90) illustrated a fine gray and red sagenitic agate from this site. |
| 989 | Duncan, fire agate collecting area in Arizona, Canton, P. M. (1977, p. 812-818). |
| 990 | Dunglass, Scotland, historic locality in East Lothian, that has produced red, mottled and violet agates from the shingle on the beach (Heddle, 1901, p. 76) who stated the site is in Haddington. Macpherson (1989, p. 19) recorded the site as ...on beach. |
| 991 | Dunure, Scotland, historic locality in Ayrshire, that Heddle (1901, p. 76) recorded as producing agates ...along the coast at Dunure. Rodgers (1975, p. 24, 25) illustrated a fine example of a faulted agate from here and (p. 85) suggested agates also came a railway cutting in the area. Fallick et al (1985, p. 672-674) stated that the agates came from lavas of the lower Old Red Sandstone of Early Devonian Age. Macpherson (1989, p. 19, 48, figs. 106, 107) suggested these agates came from several sites to the South. |
| 992 | Durango Agate, Durango, Mexico, ...no description, adv., Dowell's, Rocks and Minerals, v. 36, no. 1,2, p. 104 |
| 993 | Durango Banded Nodules, Durango, Mexico, ...blue and black predominating, adv., Southern Gem Mining Company, Lapidary Journal, v. 18, no. 5, p. 580. |
| 994 | Durango Curlicue Agate, Durango, Mexico, tubular agate, eyes, moons, and swirls, adv., American Producers, Lapidary Journal, v., 18, no 10, p. 1140. |
| 995 | Durango green and gold lace agate (2 varieties?), in Bourne, J. N., 1963, conductor, with our advertisers. Rocks and Minerals, v. 38, no. 11,12, p. 635-637. |
| 996 | Durango Lavender Agate, Durango, Mexico, no description, may be same as Royal Purple Azte Agate, adv., Greenway Slabs & Cabs, Rock & Gem, v. 7, no. 8, p. 70; Lapidary Journal, v. 30, no. 12, p. 2816 |
| 997 | Durango Moss Agate, Durango, Mexico, red, gold, or purple, adv., American Producers, Lapidary Journal, v. 18, no. 6, p. 657. |
| 998 | Durango Paisley Agate, in Bourne, J. N., 1963, conductor, with our advertisers. Rocks and Minerals, v. 38, no. 11,12, p. 635-637. |
| 999 | Durango Purple Agate, Durango, Mexico, probably the same material called Purple Amethyst Lace Agate by Lyons and Young (1961, p. 78, 79). |
| 1000 | Durango Red Flame Agate, vein, adv., American Producers, Rocks and Minerals, v. 38, no. 9,10, p. 539; in Bourne, J. N., 1963, conductor, with our advertisers. Rocks and Minerals, v. 38, no. 11,12, p. 635-637. |
| 1001 | Durango Xmas Agate, in Bourne, J. N., 1963, conductor, with our advertisers. Rocks and Minerals, v. 38, no. 11,12, p. 635-637. |
| 1002 | Dyeing Lace Agate, Chihuahua, Mexico. A vein agate that is white and porous such that it readily accepts dyes. It is described by Cross (1996, p. 74). See Crazy Lace Agate. |
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.