Agates Bibliography

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2679Rad., U. von1979SiO2-Diagenese in Tiefsee-sedimenten: Geologische Rundschau, v. 68, no. 3, p. 1025-1036.
2680Radcliffe, D., and S. Peacock1977Fire agate as a potent geological delight: Lapidary Journal, v. 31, no. 5, p. 1096-1108. Mexico, general.
2681Rae, V. E.1964Gemstones of Saskatchewan: Lapidary Journal, v. 18, no. 6, p. 703-704.
2682Rainer, T. B.1984Nodules and pseudomorphs of fossil origin: Lapidary Journal, v. 38, no. 5, p. 674-681.
2683Raisin, C.1889On Some Nodular Felstones of the Lleyn: Quarterly Journal of the Geological Society of London, v. 44, p. 247-268.
2684Rakin, V. I., and Kodanev, I. V.1999Model' rosta khaltsedona v agate [Model of chalcedony growth in agate]: Vestnik Instituta Geologii (Rossisykaya Akademiya Nauk Ural'skoye Otdeleniye, Komi Nauchnyy Tseutr), 1999, 3, p. 8, 9.
2685Ralls, R. H.1972aRockhounding in Costa Rica, Part I: Gems and Minerals, no. 422, p. 36-38.
2686Ralls, R. H.1972bRockhounding in Costa Rica, Part II: Gems and Minerals, no. 423, p. 34-40.
2687Raman, Sir C. V., and Jayaraman, A.1953The structure and optical behaviour of iridescent agate: Proceedings Indian Academy Sciences, Section A, v. 38, p. 199-206.
2688Rambow, E. V.1964Collecting and cutting petrified bone and agate: Lapidary Journal, v. 18, no.5, p. 575-580.
2689Ramirez,?1884, 1885Noticia historia de la minera de Mexico: D. F. Precious stones, pp. 237-250, (Note: listings this paper have been observed in several publications but this paper has never surfaced.)
2690Ramsay, A. M.1959Scottish gemstone locations: Lapidary Journal, v. 13, no. 4, p.574, 576-582.
2691Ramsay, A. M.1960Scottish Gem Localities, The Gemmologist, v. 29, no. 351, p. 208-215.
2692Ramsay, S.1954Hunting agates in Scotland: Rocks and Minerals, v. 29, no. 3, 4, p. 127-129. Usan (Pronounced oosan), St Cyrus, Path of Condie, Perthshire, Lord Gray, Knifamore Castle, Cutter, Lord Panmure, collector; Fife, Pebble in Scotland = agate; Balmerino, Firth of Tay.
2693Ramsay, S.1958Collecting in Scotland in 1957: Rocks and Minerals, v. 33, no. 1,2, p. 33-35. Iona Pebbles
2694Ramsey, D.1984It's all Heddle's fault: Lapidary Journal, v. 38, no. 7, p. 1014-1015. Scotland, Field trip.
2695Rand, J. C.1897aMinerals of Massachusetts, Part 1: The Mineral Collector, v. 4, no. 11, p. 161-165.
2696Rand, J. C.1897bMinerals of Massachusetts, Part 2: The Mineral Collector, v. 4, no. 12, p. 180-182.
2697Rand, J. C.1897cMinerals of Massachusetts, Part 3: The Mineral Collector, v. 5, no. 1, p. 6-8.
2698Rand, J. C.1898Minerals of Massachusetts, Part 4: The Mineral Collector, v. 5, no. 2, p. 29.
2699Rand, T. D., Jefferis, W. W., and Cardeza, J. T. M.1893Mineral localities of Philadelphia and vicinity: Academy of Natural Sciences of Philadephia. Proceedings, v. 44, p. 174-202.
2700Randal, O.1956Collecting in Jacolitos Canyon: Gems and Minerals, no. 225, p. 44, 46, 50.
2701Randolph, G. C.1934Agates through the ages: The Oregon Mineralogist, v. 2, no. 3, p. 1,2. History, mythology.
2702Randolph, G. C.1935aCryptocrystalline or amorphous varieties of quartz: The Mineralogist, v. 3, no. 1, p. 30-51.
2703Randolph, G. C.1935bDoes strong sunlight deepen the color of carnelian agate? The Mineralogist, v. 3, no. 3, p. 17-18. India, Australia, Brazil.
2704Randolph, G. C.1935cPetrified forest topic of recent volume: The Mineralogist, v. 3, no. 7, p. 21. Review of Wieland, 1935.
2705Randolph, G. C.1935dOpal - color composite of all gems: The Mineralogist, v. 5, no. 6, p. 24.
2706Randolph, G. C.1935eOpal - Virgin Valley Field, Largest deposit in U.S.A. The Mineralogist, v. 3, no. 10, p. 9, 10, 18, 19.
2707Randolph, G. C., and Dake, H. C.1936Extensive areas of silicification predominate in the west: The Mineralogist, v. 3, no. 4, p. 5, 6, 30-33. Magmatic water as silica source.
2708Ransom, J. E.1953aGemstones in the Bradshaws: Desert Magazine, v. 16, no. 10, p. 17-21.
2709Ransom, J. E.1953bAgate-seamed butte at Bouse: Desert Magazine, v. 16, no. 11, p. 13-16.
2710Ransom, J. E.1954Petrified flotsam along the Colorado: Desert Magazine, v. 17, no. 4, p. 8-11.
2711Ransom, J. E.1955aPetrified forest trails: A guide to the petrified forests of America: Oregon Mineralogist Publishing Company. Portland, Oregon. 80 pp.
2712Ransom, J. E.1955bArizona gem trails and the Colorado Desert, Oregon Mineralogist Publishing Company, Portland Oregon. 96 pp.
2713Ransom, J. E.1955cGemstones of Eastern Arizona: Lapidary Journal, v. 9, no. 1, p. 4-6, 8, 10, 12, 14-16, 18, 20, 22. Clifton, Greenlee counties, Peloncillo Mountains, Limestone Canyon, Ward Canyon, Mulligan Peak.
2714Ransom, J. E.1955dMore California gem trails: The Mineralogist, v. 23, no. 3, p. 99-102.
2715Ransom, J. E.1955eSouthwest gem trails and the Green Squaw Jasper: The Mineralogist, v. 23, no. 4, p. 147-151. Arizona, field trip, type locality, description. ?
2716Ransom, J. E.1955fHorsetail petrified forest of Colorado: The Mineralogist, v. 23, no. 9, p. 302, 304, 306.
2717Ransom, J. E.1955gWorld's finest opalized woods: The Mineralogist, v. 23, no. 11, p. 387-390. Washington, Oregon, field trip.
2718Ransom, J. E.1956aMontana's Dryhead Agate, a new locality: The Mineralogist, v. 24, no. 2, p. 56-58, 60. ?
2719Ransom, J. E.1956bThe Wyoming gem country: Lapidary Journal, v. 10, no. 1, p. 18, 20-24, 26, 28, 30, 32-33. Specimen Hill Black & White Agate, Sweetwater Agate, Eden Valley Wood, Green River Petrified Forest, Du Bois area, calcareous algae.
2720Ransom, J. E.1956cWhere to go in Arizona: Lapidary Journal, Annual Rock Hound Buyer's Guide, p. 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46 Ward Canyon, Peloncillo. ?
2721Ransom, J. E.1956dSome Arizona gem trails: The Mineralogist, v. 24, no. 1, p. 3-7.
2722Ransom, J. E.1956eLand of dinosaurs and agates: The Mineralogist, v. 24, p. 387-391.
2723Ransom, J. E.1957North Pacific Coast gem hunting: Lapidary Journal, v. 11, no. 1, p. 72, 74, 76, 78, 80, 82, 84. Oregon, Washington, field trip.
2724Ransom, J. E.1962The Rock-Hunter's Range Guide: Harper & Brothers, New York, New York. (Not seen)
2725Ransom, J. E.1974Gems and minerals of America: A guide to rock collecting. Harper and Row, New York. 705 p.
2726Rapp, G. R., Jr., and Wallace, D. T.1966Guide to Mineral Collecting in Minnesota: Minnesota Geological Survey, Educational Series-2, 2nd Revised Edition, 1979. 42 p. Lake Superior Agate, Paradise Beach Agate, Cold-Water Agate.
2727Rapson - McGugan, J. E.1970The diagenesis and depositional environment of the Permian Ranger Canyon and Mowitsch Formations, Ishbel Group, from the Southern Canadian Rocky Mountains: Sedimentology, v. 15, no. 3, 4, p. 363-417.
2728Rath, G. V.1877[Mineralogical Notes]: Verhandlungen naturhist Vereins, RheinlandSitz. d. niederrh. Ges.(selschaft?), p. 63-80.
2729Ratkevich, R.1981Fossil collecting in Copper Country: Rocks and Minerals, v. 56, no. 1, p. 18-22, Arizona, petrified wood.
2730Ray, H. C.1941Minerals of Porto Rico: Rocks and Minerals, v. 16, no. 10, p. 355-359.
2731Ray, W. C.1964Agate paneled windows in a Texas church: Lapidary Journal, v. 17, no. 12, p. 1168-1169. Lapidary Project
2732Read, C. B.1930Fossil floras of Yellowstone National Park, Part I, Coniferous woods of the Lamar River Flora: Carnegie Institution of Washington Publication 416, p. 1-9.
2733Ream, L. S.1977Gems and Minerals of Washington, A collector's reference: Jax Products, Renton, VA. p. 202.
2734Ream, W. A., Dean, J. H. and Cole, A. J.1971Some Namurian, Paralic sediments in Central Scotland: Journal Geological Society, v. E2, p. 127, 137-171.
2735Reamer, L.1929Agate found in an old abandoned quarry: Rocks and Minerals, v. 3, no. 4, p. 109.
2736Reaves, D.1965Suwanee River agatized coral---a new gem variety: Lapidary Journal, v. 19, no. 3, p. 420-422.
2737Reban, J.1985Bohemian Garnets: Lapidary Journal, v. 39, no. 1, p. 18, 19, 24. Bohemian Agate illustrated in color.
2738Redfield, J. S.1927Mineral resources in Oklahoma: Oklahoma Geological Survey Bulletin 42, 130 p.
2739Redford, W.1990Agate Daisy: Lapidary Journal, v. 44, no. 2, p. 75-76. Lapidary Project.
2740Redshaw, L. C.1936The birth of an opal: The Mineralogist, v. 4, no. 7, p. 23.
2741Reed, E. A.1905aThe precious stone industry in the United States: Scientific American Supplement, v. 59, p. 24470-24471.
2742Reed, E. A.1905bThe semi-precious stones of the United States: Mining and Scientific Press, v. 90, p. 355-356.
2743Reed, F. T.1947Some Oklahoma gem trails: The Mineralogist, v. 15, no. 2, p. 64-65, 88. Field trip, Woods, Woodward, Harper counties, Oklahoma.
2744Reed, M. F.1940Genesis of the "thunder egg": The Mineralogist, v. 8, no. 9, p. 368.
2745Reed, M. F.1949The thunder egg: The Mineralogist, v. 17, no. 10, p. 492, 494.
2746Reese, J. H.1947Lapidary treatment of opalized wood: Lapidary Journal, v. 1, no. 2, p. 57-58.
2747Reeves, A.1941A Utah Field Trip: The Mineralogist, v. 9, no. 11, p. 403-404. Cisco Agate Field , (= Pigeon Blood Agate?)
2748Reeves, A.1945Some Nevada Pickings: Rocks and Minerals, v. 20, no. 1, p. 16-17.
2749Reeves, K. R.1952How to Photograph Gems: Lapidary Journal, v. 6, no. 3, p. 180-184. Nipomo, New Mexico, Redondo Beach, Horse Canyon agates illustrated.
2750Reiner, J.1981Agates, in Thumbnails: Rocks and Minerals, v. 56, no. 4, p. 169.
2751Reiner, T. A.1937Fracture agate: Rocks and Minerals, v. 12, no.12, p. 370.
2752Reiner, T. A.1941Agates of the Yellowstone River Valley, Montana: Rocks and Minerals, v. 16, no. 9, p. 319-325. Montana, field trip.
2753Reiner, T. A.1942Beautiful and unique agates from Texas: Rocks and Minerals, v. 17, no. 2, p. 58-59
2754Reiner, T. A.1946Going West: Rocks and Minerals, v. 21, no. 3, p. 131-135. South Dakota, Montana, field trip.
2755Reis, O. M.1916/1917aUber blasenenstehung in Gesteinen und uber Achatbildung (Mit einem Anhang: Uber Baryt in Achatmandeln, uber Kalzitachat und Enhydros): Geognost Jahrehshefte, v. 29-30, p. 81-298. (Not seen)
2756Reis, O. M.1916/1917bEinzelheiten uber Bau und Entstehung von Enhydros, Kalzitachat und Aghat, Part I: Geognost Jahreshefte, v. 29/30, p. 81-298. (Not seen). Harder (1993, p. 48 shows p. 7-44).
2757Reis, O. M.1918-1919Einzelheiten uber Bau und Entstehung von Enhydros, Kalzitachat und Aghat, Part II: Geognost Jahreshefte, v. 31/32, p. 1-92. (Not seen)
2758Reis, O. M.1923Das oberrotliegende Grenzlager im Haardtgebirge, seine Stellung und seine Einschlusse: Geognost Jahreshefte, v. 36, p. 75-102. (Not seen)
2759Reis, O. M., and Heim, F.1924 (1925?)Uber Kieselszureseptarien und -Geoden (Lithophysen) in Verbindung mit Eruptivgesteinen: Jahrbuch Preuss Geol. L. Anst., v. 45, p. 451-488. (Not seen)
2760Reissmann, R.1993Ausbildung und Stellung der Minerale hydrothermaler Quarz-Fluorit-Baryt-Gange im Osterzgebirge: Dissertation, TU Bergakademie Freiberg.
2761Reji, L., and Skalicky, J.1977Gemstones of Czechoslovakia and their use in jewelry: Lapidary Journal, v. 31, no. 6, p. 1334-1338. Bohemian Agate, Cesky Raj.
2762Renton, J. L.1934aSagenite agate: Oregon Mineralogist, v. 2, no. 2, p. 9, 17. inclusions, rutile, actinolite, Au, Pyrite, natrolite, pyrolusite, stalk aggregates.
2763Renton, J. L.1934bOne of Oregon's Finest Agates: Oregon Mineralogist, v. 2, no. 4, p. 16. Lane County. sagenite
2764Renton, J. L.1934cPolishing large slabs: Oregon Mineralogist, v. 2, no. 6, p. 10, 11,
2765Renton, J. L.1935aOne of Oregon's most beautiful sagenitic agates: The Mineralogist, v. 3, no. 1, p. 31. Lane County, Yachats.
2766Renton, J. L.1935bColored hyalite opal found in large masses at opal Butte, Ore.: The Mineralogist, v. 3, no. 1, p. 36, 37. Morrow County.
2767Renton, J. L.1936Opal or agate filled "thunder eggs": The Mineralogist, v. 4, no. 1, p. 12, 46, 48, 50, 52. rhyolite bomb = thunder egg, septuary nodule = thunder egg, spherulite = thunder egg, Warm Springs Reservation, Indians, Clarno Formation, Mounts Hood and Jefferson.
2768Renton, J. L.1939"Thunder Egg" Genesis: The Mineralogist, v. 7, no. 11, p. 414-415.
2769Renton, J. L.1951Some notes on thunder eggs: Mineralogist, v. 19, no. 4, p. 171-177.
2770Reusch, E.1864Uber den Agat: Ann. Phys. Chem, v. 123, p. 94-114. (Not seen).
2771Rex, R.1946The gold mines of Monte Aguacate, Costa Rica: Rocks and Minerals, v. 21, no. 9, p. 561-563.
2772Rex, R.1947Jasper near Milton, Vermont: Rocks and Minerals, v. 22, no. 10, p. 910-911.
2773Rhinear, T.1947The stones of Sinai: Hobbies, July, 1947, v. 52, no. 5, p. 136. Moss agate of similar quality to Mocha Stone.
2774Rice, B.1971Rainbow Wood in Oklahoma: Lapidary Journal,v. 25, no. 4, p. 601.
2775Rice, G.1971Rainbow wood in Oklahoma: Gems and Minerals, no. 406, p. 13, 14. Oklahoma, field trip.
2776Rice, H. M.1964Untitled: Lapidary Journal, v. 18, no. 7, p. 840. Letter concerning nomenclature for competitive exhibits in AFMS.
2777Richard, H. M.1977Arizona's two hundred million year old trees: Lapidary Journal,v. 31, no. 1, p. 114-124. Petrified forest.
2778Richards, R. A.1956Arizona Agate Hunting: Rocks and Minerals, v. 31, no. 5,6, p. 222, 279-280.
2779Richardson, C. H.1925The mineralogy of Kentucky: Kentucky Geological Survey. 6th Series, v. 27, 127 p.
2780Richardson, T.1946Where tree stumps turned to stone: Desert Magazine, v. 10, no 1, p. 19-21.
2781Richey, J. E.1935Scotland: The Tertiary Volcanic District: Geological Survey of Great Britain, H.M.S.O., Edinburgh. (not seen)
2782Richey, J. E.1948Scotland: The Tertiary Volcanic District. 2nd Edition, revised: Geological Survey of Great Britain, H.M.S.O., Edinburgh.
2783Richmond, J.1990Lune Cone Onyx and Other Gemstones Gold, Gem and Treasure, v. xx, no. yy, p. zz. Tasmania
2784Richter, G. M. A.1956Catalogue of Engraved Gems, Greek, Etruscan, Roman: Metropolitan Museum of Art, New York. L=Erma di Breitschneider, Roma, 143 p.
2785Richter, G. M. A.1968?The engraved gems of the Greeks, Etruscans, and Romans: Phaidon Press, London, 351 p.
2786Rickell, W. L.1973Flints for firing: Rock and Gem, v. 3, no. 2, p. 30. Muzzle loading rifles.
2787Ridgway, C., and Green, J. H.1943The formation of tube agates: The Mineralogist, v. 11, no. 7, p. 210-211.
2788Ridgway, J. E.1945Re Agate - Agate Creek, Percyville: Queensland Government Mineralogical Journal, no. 46, p. 299-300.
2789Rieman, H. M.1970Cacti, Palms, Yuccas, etc.: Rocks and Minerals, v. 45, no. 4, p. 244-247. Relationships, Southwestern United States.
2790Rieman, H. M.1971Thunder Eggs: Lapidary Journal, v. 24, no. 10, p. 1328-1335.
2791Rieman, H. M.1973Chrysoprase: Lapidary Journal, v. 27, no. 3, p. 559-562.
2792Rieman, H. M.1974Thundereggs: Lapidary Journal, v. 24, no. 10, p. 1328-1335. Priday Ranch, Succor Creek, Buchanan, Ochoco.
2793Rieman, H. M.1977Palms and palm wood: Lapidary Journal, v. 30, no. 10, p. 2310-2312. Morphology, general.
2794Rieman, H. M.1981Gingko (The maidenhair tree): Lapidary Journal, v. 35, no. 4, p. 950-952.
2795Rieman, H. M.1983Rockhound Wood: Lapidary Journal, v. 37, no. 8, p. 1200 - 1205.
2796Riesen, F. E.1993Condor Agate: Rock and Gem, v. 23, no. 3, p. 64, 65. Colored illustrations.
2797Riethe, P.1979Hildegard von Bingen: das Buch fon den Steinem: Salzburg. (Not seen)
2798Riley, M. E.1947"In the beginning---": Rocks and Minerals, v. 22, no. 1, p. 14-15. OR, Newport Beach.
2799Riley, M. S.1947Flint Ridge, Ohio: Rocks and Minerals, v. 22, no. 8, p. 710-713.
2800Rinehart, H. E.1944Life in Virgin Valley and history of the discovery of opals there: rocks and Minerals, v. 19, no. 1, p. 12-13.
2801Rink, W. J., Rendell, H., Marseglia, E. A., Luff, B. J., and Towsend, P. D.1993Thermoluminescence spectra of igneous quartz and hydrothermal vein quartz: Physics and Chemistry and Minerals, v. 20, p. 353-361.
2802Riotte, L.1971New Mexico's Rockhound State Park: Gems and Minerals, no. 410, p. 28, 29.
2803Ripley, G., and Dana, C. A., [editors]1883The American Cyclopaedia: A popular dictionary of general knowledge: v. 1, A - Asher. D. Appleton and Company, New York: 1, 3, and 5 Bond Street. London 16, Little Britain, p. 177-179.
2804Robart, V. J.1957Gem flint from Ohio: Lapidary Journal, v. 11, no. 1, p. 28, 30.
2805Roberson, L. E.1948Mount and Wear Your Cabochons: Lapidary Journal, v. 2, no. 3, p. 140-142.
2806Roberts, W. L., and G. Rapp1965Mineralogy of the Black Hills: South Dakota School of Mines and Technology Bulletin 18, 368 p.
2807Robertson, D.1969Noodling in Virgin Valley: Desert Magazine, v. 32, no. 9, p. 8-10.
2808Robertson, D.1970aTurtle Mountain Treasures: Lapidary Journal, v. 24, no. 4, p. 570-574.
2809Robertson, D.1970bCollecting in Tuledad County: Lapidary Journal, v. 24, no. 5, p. 737-739. Tuledad Agate
2810Robertson, D.1972aThe Duffield's Little Joe opal mine: Lapidary Journal, v. 26, no. 7, p. 1096-1102.
2811Robertson, D.1972bThundereggs at Crane Creek: Rockhound, v. 1, no. 2, p. 31-33. ?
2812Robertson, D.1972cJackpot at Duck Flats: Rockhound, v. 1, no. 3, p. 10-12.
2813Robertson, D.1975Owyhee Plume Agate: Rock and Gem, v. 5, no. 10, p. 16-21.
2814Robertson, D.1976El Paso Mountains: Rock and Gem,v. 6, no. 10, p. 16-20. California, field trip.
2815Robins, D. Z.1975Specimen collecting in Eastern Oregon: Lapidary Journal, v. 29, no. 3, p. 584, 586. Buchanan, Oregon Thunder Eggs, Eagles Nest, Stinking Water petrified woods.
2816Robinson, C. H.1949Trip to Red Top Mountain, Washington: Rocks and Minerals, v. 24, no. 11,12, p. 574-579. Washington, Red Top Mountain, Ellensburg Blue Agate.
2817Robinson, G. W., and Alverson, S. W.1971Minerals of the St. Lawrence Valley: Potsdam, New York 43 p.
2818Robinson, M., and Robinson, G.1966A fun trip for rare agate: Lapidary Journal, v. 20, no. 9, p. 1106-1109. Ruin Agate, West Texas.
2819Robinson, S.1825aA catalogue of American minerals with their localities; including... United States and British Provinces: Cummings, Hilliard and Company. Boston, Massachusetts, 316 p.
2820Robinson, S.1825b, (1936)Early American agate localities: Extracted from A Catalogue of American Minerals with their Localities. Rocks and Minerals, v. 11, no. 9, p. 178-180.
2821Robles, S. J.1991Las rocas ornamentales en la region de Murcia [Ornamental stones of Murcia] Mineria y Siderurgia, v. 5, p. 5-14.
2822Roblyer, J. R.1939The Gem State Gems: The Mineralogist, v. 7, no. 1, p. 9, 10, 17, 18.
2823Rochester, E.1947Iridescent limonite in chalcedony: Rocks and Minerals, v. 22, no. 10, p. 924-925. Mule Mountains, Riverside County, California.
2824Rochester, E.1953Mule Mountain Agate, The Mineralogist, v. 21, no. 1, p. 18, 20. California, Fire Agate, South-eastern Riverside County, roses, nodules, chunks.
2825Rockwell, E. H.1938Quartz minerals in Oregon: Hobbies, v. 43, no. 10, p. 106. Ashwood area, Rogue River area, black moss agate.
2826Roder, C.1964Tampa's Coral Wonders. Lapidary Journal, v. 18, no. 7, p, 812-813.
2827Rodgers, J.1969aThe Lebanon Carnelian Area of Oregon: Lapidary Journal, v. 23, no. 1, p. 61-62. Lebanon Carnelian.
2828Rodgers, J.1969bA visit to Succor Creek: Lapidary Journal, v. 23, no. 2, p. 324-328.
2829Rodgers, J.1969cThe snakeskin agate area, Oregon: Lapidary Journal, v. 23, no. 7, p. 960-962.
2830Rodgers, J.1970aThe Ochoco Mountains, Thunder Egg Country: Lapidary Journal, v. 23, no. 11, p. 1482-1484, 1486. Lucky Strike, Valley View Stein's Pillar, White Fir Springs, White Rock Springs.
2831Rodgers, J.1970bThe Rockhound's Map of Oregon: Portland, Oregon. Oregon Agate & Mineral Society publishers.
2832Rodgers, J.1970cDigging Holly Petrified Wood:. Gems and Minerals, no. 392, p. 28. Oregon, field trip.
2833Rodgers, J.1970dA visit to Antelope and Ashwood areas in Oregon: Lapidary Journal, v. 24, no. 1, p. 151-154.
2834Rodgers, J.1970eThe Kennedy Ranch---reopened after 25 years: Lapidary Journal, v. 24, no. 3, p. 420-426.
2835Rodgers, J.1971aAshwood, Oregon Agate: Lapidary Journal, v. 25, no. 3, p. 460-465. Friends Ranch eggs, McDonald Ranch Plumes, Norton Ranch, Priday Ranch.
2836Rodgers, J.1971bHappenings in Oregon: Lapidary Journal, v. 25, no. 4, p. 588-591. "Yellow Jackets" (thunder egg), Roger Mountain Wood.
2837Rodgers, J. R.1976Classic Oregon Localities: Lapidary Journal, v. 30, no. 1, p. 116-128. Willammette River, Lebanon, Holley, Medford areas, Oregon beaches, Ashwood, Richardson Ranch, Priday Ranch, Antelope, Biggs, Deschutes River, Sunflower Flats, Succor Creek, Graveyard Point, Sagenite Hill, Stinking Water, Nigger Rock, Buchanan, Mc Dermitt, Rome, Morrisonite, Hampton Butte, Pink Limbs, Maury Mountain, Eagle Rock, Carey Ranch, Swartz Canyon Wood, Ochoco Mts.
2838Rodgers, P. R.1973Agates of the Ochil Hills: Gems, v. 5, no. 6, p. 2-3.
2839Rodgers, P. R.1974aCornelian Bay, Yorkshire: (Classic Collecting Sites of Britain, No. 10.). Gems, v. 6, no. 1, p. 35.
2840Rodgers, P. R.1974bGemstones of Rhum: Gems. v. 6, no. 5, p. 32-33.
2841Rodgers, P. R.1975Agate collecting in Britain: B. T. Batsford, London and Sydney, 96 p., 16 line drawings, 65 photographs, 11 maps, 4 color plates. ISBN 0 7134 3056 7
2842Rodgers, P. R.1976aBloodstone Hill, (In the Footsteps of Heddle - 7).: Gems, v. 8, no. 2, p. 11-14.
2843Rodgers, P. R.1976bMontrose, (In the Footsteps of Heddle - 8): Gems, v. 8, no. 3, p. 13-15.
2844Rodgers, P. R.1976cMontrose Again, (In the Footsteps of Heddle - 9): Gems, v. 8, v. 4, p. 25-27.
2845Rodgers, P. R.1976Burn Anne, near Galston, Ayrshire, (In the footsteps of Heddle - 7): Gems, v. 8, no. 6, p. 12, 13.
2846Rodgers, P. R.1977Getting to know all about Rocks and Minerals, (Part VII: Pebbles on Scotland's Beaches): Gemcraft, v. 4, no. 10, p. 663-664.
2847Rodgers, P. R.1979Agate collecting in Britain; selecting suitable sites: Gemcraft, v. 6, no. 3, p. 140-142.
2848Rodgers, P. R.1982A preliminary report on English agates: In Sutherland, A., Gray, R., and Tait, A., (editors), Agate Symposium Proceedings, Scottish Mineral and Lapidary Club, Royal Scottish Museum Chambers Street, Edinburgh. p. 99-107.
2849Roebuck, P.1974Gems of the silica group: Rocks and Minerals, v. 49, no. 2, p. 136.
2850Roedder, E.1917Silicate liquid immiscibility in magmas. In Yoder, H. S. (editor) The evolution of the ingeous rocks, Princeton [University Press?], p. 15-57.
2851Rogers, A. F.1924Mineralogy and petrography of fossil bone: Geological Society of America Bulletin, v. 35, no. 3, p. 535-556.
2852Rogers, A. F.1938Fossil termite pellets in opalized wood from Santa Maria, California: American Journal of Science, v. 36, 389-392.
2853Rogers, A. F.1947Blue agate of Lead Pipe Springs, San Bernardino County, California, [Abstract]: Geological Society of America Bulletin, v. 58, no. 12, pt. 2, p. 1256.
2854Rohde, B. H.1964Collecting in Colorful Colorado: Lapidary Journal, v.1,no. 1, p.66-74.
2855Rohn, K.1997Collecting moss agates in Montana; Prairie County still holds many rockhound treasures: Rock and Gem, v. 27, no. 10, p. 68-70, 72, 73.
2856Rohn, K. H.1979In search of Lake Superior Agates: Gems and Minerals, no. 503, p. 76-79.
2857Rohn, K. H.1980A Mesabi Range field trip: Gems and Minerals, no. 513, p. 36-39.
2858Rohn, K. H.1981A Yellowstone field trip: Gems and Minerals, no. 527, p. 94-96.
2859Rohn, K. H.1984Agates galore: Gems and Minerals, no. 564, p. 66-68.
2860Rohn, K. H.1985A Red River Valley field trip: Gems and Minerals, no. 573, p. 40-42. North Dakota.
2861Rohn, K. H.1998Miles of great collecting in Minnesota: Rock and Gem, v. 28, no. 5, p. 40-42, 47.
2862Rohn, K. H.2000Red Drift Treasures: Rock and Gem, v. 30, no. 6, p. 80-82.
2863Rolff, A.1970Gem news from Brazil: Lapidary Journal, v. 24, no. 3, p. 514-516.opal mining.
2864Rondeau, L., Mrs.1953Ma Quant - thunder egg queen: The Mineralogist, v. 21, no. 5, p. 206, 208, 210.
2865Ronson, S.1964Gemstones of Quebec: Lapidary Journal, v. 18, no. 6, p. 702
2866Root, F. K.1972Minerals and rocks of Wyoming: Geological Survey of Wyoming Bulletin 56, 56 p.
2867Root, J. unknownBruneau Wood: Gems and Minerals, no. 409, p. 36, 37.Idaho, field trip.
2868Roots, R.1965The fable of the foxes and the little red hen: Lapidary Journal, v. 19, no. 1, p. 174. picture agate
2869Roots, R. D.1952Thunder eggs: Rocks and Minerals, v. 27, no. 5,6, p. 234-236. Nevada, Burns, Oregon, Southern California, Baker Ranch, New Mexico, Del Norte Colorado (=Monte Vista eggs), Ochoco, Oregon.
2870Rosemeyer, T.2001A spectacular Find of Amygdaloidal Agates with Native Copper Inclusions from Michigan Copper Country: Rocks and Minerals, v. 76, no. 6, p. 403.
2871Rosenblohm, W. E.1955Traveling the Appalachian Gem Trail: Lapidary Journal, v. 9, no. 1, p. 34, 36, 38, 40.
2872Rosenblohm, W. E.1958Geologic and Gemologic Thought in Early Classical Times: Lapidary Journal, v. 12, no. 3, p. 394-404.
2873Rosenbusch, H.1910Elemente der Gesteinslehre: v. 1, pages not known.
2874Rosenhouse, L.1974Rockhounding in Central Oregon: Rock & Gem, v. 4, no. 4, p. 16-21.
2875Rosenhouse, L.1975Gemstones along Idaho's River of No Return: Gems and Minerals, no. 451, p. 34-36.
2876Roskam, O., and Roskam, B.1968Missouri's official state mineral and rock: Lapidary Journal, v. 22, no. 5, p. 632-633.
2877Rosler, H. J., Blankenburg, H., Reif, A., and Berger, H.1978Uber die Moglichkeit der strukturellen Charakterisierung von Quarzen verschiedener Genese mit Hilfe der rontgenographischen Profilanalyse: Zeitschrift Geologische Wissenschaften, v. 6, p. 719-725. (Not seen)
2878Ross, B.1973Montana agate: Rocks and Minerals, v. 48, no. 9, p. 556. Poem.
2879Ross, B.1974Montana agate: Rocks and Minerals, v. 49, no. 9, p. 542. Poem
2880Ross, C. S.1941Origin and geometric form of chalcedony-filled spherulites from Oregon: American Mineralogist, v. 26, no. 12, p. 727-732. Reprinted in The Mineralogist, v. 10, no. 6, p. 171-174, 192-193.
2881Ross, C. S., and Smith, R. L.1961Ash-Flow Tuffs: Their Origin, Geological Relations, and Identification: U. S. Geological Survey Professional Paper 366, 81 pp.
2882Ross, R.1974Lightning Ridge Opal Knobby: Lapidary Journal, v.27, no. 12, p. 1796-1802. Color pix.
2883Ross, R. N.1937Oregon Coast Good Collecting Field: The Mineralogist, v. 5, no. 12, p. 12. Flower jasper, Newport, Agate beaches, Roads End, Enhydros.
2884Rossi, F.1967La pittura di pietre: Florence, Banco Tuscano, 132 p.
2885Rossi, F., and Procacci, U.1984La pittura di pietra: Ferdinando Rossi, Presentazione di Ugo Procacci, Fotolito Toscana, Giunti Martello Editore, Firenze, 170 p.
2886Roth, E. S.1951Quartz: Rocks and Minerals, v. 26, no. 1,2. p. 18-21. General article
2887Rothbaum, H. P. and Rohde, A. G.1979Kinetics of silica polymerization and deposition from dilute solutions of between 5 and 180 oC: Journal of Colloidal Interface Science, v. 71, no. 3, p. 533-559.
2888Rothrock, E. P.1944A geology of South Dakota, Part 3: Mineral Resources, South Dakota Geological Survey Bulletin 15. 255 p.
2889Rothstein, J.1960"Keweenaw - Copper Country:" Rocks and Minerals, v. 34, no. 9, 10, p. 440-444.
2890Rothstein, J.1979The terminal moraines of Long Island, New York: Lapidary Journal, v. 32, no. 10, p. 2230-2236.
2891Rothstein, J.1982Hydrophane: Lapidary Journal, v. 36, no. 9, p. 1490-1498, 1512-1514.
2892Roush, L., and Roush, W.1968Gemstones from Ohio River gravel banks: Lapidary Journal, v. 22, no. 7, p. 974-975. West Virginia.
2893Rowe, M. E.1956Stone Canyon Jasper: Lapidary Journal, v. 10, no. 1, p. 44-46. Jurassic, Franciscan, brecciated, yellow, white, green, red jaspers.
2894Rowe, R. C.1977Biblical minerals: Gems and Minerals, no. 474, p. 36-37, 74-75.
2895Rowley, E. B.1963Geology and mineralogy of the Adirondack Mountain region: Northland Rock and Mineral Club, Lake Placid, New York. 35 p.
2896Royster, T.1951Iowa gem gravels: The Mineralogist, v. 19, no. 12, p. 562, 564.
2897Rozhkova, V. V., Yerilova, T. A., and Savel'yev, A. S.1980Elektronnomikroskopicheskoye izucheniye severotomanskiklh agatov (v. svyazi s prirodoy ikh svoyetv I problemoy genezisu), [Electron microscope investigation of agate in northern Timan Ridge; properties and genetic problems]: Trudy-Institut Geologii, 30, p. 79-85.
2898Rundquist, B.1992Geologists uncover agate origins, revamp theory of formation: Resource News. Conservation and Survey Division, IANR, University of Nebraska - Lincoln. v. 1, no. 5, p. 1, 2.
2899Ruskin, J.1867aOn banded and brecciated concretions: Geological Magazine, v. 4, first series, p. 337-339.
2900Ruskin, J.1867bOn brecciated formations: Geological Magazine, v. 4, first series, p. 481-483.
2901Russell, K.1952Chicago lapidary show a success: Earth Science Digest, v. 6, no. 2, p. 19, 38. illustrated agates
2902Russell, K. M.1973A love affair with the world's finest agates: Lapidary Journal, v. 26, no. 12, p. 1758-1760. Lapidary, general
2903Rutley, F.1894On the origin of certain novaculites and quartzites: Quarterly Journal Geological Society of London, v. 50, no. 24, p. 377-392.
2904Ruzic, R. N.1970Gemology and the Lapidary in Ancient India: Lapidary Journal, v. 24, no. 5, p. 696-707.
2905Rykart, R.1989Quarz-Monographie: Ott-Verlag, Thun, xx p. (Pagination not known, not seen).
2906Rykart, R.1995Zur Entstehung der sternformigen Achate in sauren Vulkaniten: Der Aufschluss, v. 46, p. 33-36.
2907Rykart, R.1997Flammenachat aus Brasilien. Zur Entstehung ungewohnlicher Chalcedon-Auarz-Geoden aus dem Parana-Becken, Rio Grande do Sul, Brasilien: Lapis, 5/97, p. 27-31.
2908Rynerson, F.1967Exploring and mining for gems and gold in the West, 54 years of prospecting, digging, and gem-cutting: Naturegraph Company, Healdsburg, California, 204 p.