Agate Bibliography

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472Cadle, B.1972Rockhounding in Australia: Lapidary Journal, v. 26, no. 7, p. 1034-1039.
473Cady, S. L.1994Microfibrous quartz and crystalline opaline silica varieties; microstructural characteristics by transmission electron microscopy and quantitative X-ray texture analysis: Unpublished PhD Dissertation, University of California, Berkeley.
474Cady, S. L. and Wenk, H. R.1992An HRTEM investigation of the metastable low-temperature silica phase opal-CT in cherts and porcelainites from the Monterey Formation, CA: Geological Society of America Abstracts with Programs, v. 24, p. A-116.
475Cady, S. L., Wenk, H. R., Kilaas, R., and Barber, D. J.1993Enantiomorphism and planar defect in length fast chalcedony: In Boland, J. N., and Fitz Gerald, J. D., (editors) Defects and Processes in Solid State: Geoscience Applications, Elsevier, Amsterdam, p. 383-499.
476Cahen, E.1930?Jelly Chemistry: Rocks and Minerals. v. 3, no. 4, p.112-116
477Cain, E. E. H.1952Oregon - the Home of the Thunderegg: Lapidary Journal. v. 6, n. 1, p. 4-6, 8, 9
478Caldwell, M., Miss1948Blue agates and dendrites: The Mineralogist, v. 16, n. 2, pp. 99, 100, 102.
479Caley, E. R., and J. F. C. Richards, translators1956Theophrastus on Stones, Greek Text, English translation and commentary: Ohio State University Press, Columbus, Ohio. 238 p.
480California Division of Mines1950Jade and chrysoprase in Tulare County: Mineral Infromation Service v. 3, no. 1, p. 2.
481Call, H. C.1974Chalcedony pseudomorph after coral or agatized coral: Rocks and Minerals, v. 49, no. 9, pp. 561-562. Florida, agatization processses.
482Call, R. E.1891The Tertiary silicified woods of eastern Arkansas: American Journal of Science, v. 42, p. 394-401.
483Call, R. E.1892The Tertiary silicified woods of eastern Arkansas: Iowa Academy of Sciences Proceedings, volume 1, part 2, p. 37-43.
484Calvert, S. E.1977Mineralogy and silica phases in deep-sea cherts and porcelainites: Philosophical Transactions Royal Society London, A, no.? 286, p. 239-252.
485Cameron, W. E.1900The Etheridge and Gilbert Gold Fields: Geological Survey of Queensland, Report no. 151. Cited without title in Ridgway (1945, p. 299) and sometimes erroneously listed as Geological Society of Queensland.
486Campbell, F. J.1951Displaying pictures in rocks: The Mineralogist, v. 19, no. 5, p. 267, 268, 270, 272, 274.
487Campbell, I. C.1980Personal notes on gems, minerals, and related aspects: Zimbabwe, Rhodesia: Lapidary Journal, v. 33, no. 12, p. 2635. FT
488Campbell, R. W.1978Nova Scotia Wood: Lapidary Journal, v. 32, no. 4, p. 998-1000. Canadian Rockhound, 1966. Princeton fossil wood. v. 10, p. 126-127. (to anon)
489Campbell, T. J. and Roberts, W. L.1985Mineral Localities in the Black Hills of South Dakota: Rocks and Minerals, v. 60, no. 3, p. 109-118.
490Canfield, F. A1889A Catalogue of Minerals Found in New Jersey: Final Report of the State Geologist, Volume 2, Trenton, New Jersey. p. 3.
491Cannon, G. L.1903Fossil woods of the Platte River Valley: The Proceedings of the Colorado Scientific Society, Volume 7.
492Canton, P. M.1974Fire Agates in Arizona and California. Lapidary Journal v. 31, no. 3, p. 812 - 818. Coon Hollow, CA; Sitgreaves (Meadow Creek) Pass, AZ; Saddle Mt. AZ; Ash Peak Creek AZ; Clifton, AZ; Duncan, AZ; Bowie, AZ; Deer Creek, AZ; terminology: Peacock, royal, select, mine run=regulars date may be 1977, rkp
493Carey, E.1968The fabulous Carey Plume Agate Bed: Lapidary Journal, v. 22, no. 3, p. 444-445. Oregon
494Carlson, B.1979Twelve Mile: Gems and Minerals, no. 495, p. 56, 83. (field trip)
495Carlson, G. F. and Peacock, C. A.1975Lithic Distribution in Nebraska: in Lithic Source Notebook, Section of Archaeology, Division of Historical and Cultural Affairs, State of Delaware, Milford, Delaware.
496Carozzi, A. V.1960Microscopic Sedimentary Petrography: John Wiley and Sons, New York, 485 p. Pisolites in agate.
497Carpenter, A. C.1963About Missouri Agate and Mozarkite: Lapidary Journal, v. 17, no. 1, p. 117.
498Carpenter, J. T.1936Idaho - The Gem State: The Mineralogist v. 4, no. 1. p. 15-16, 54. Succor Creek jasper (plasma), Squaw Butted opal. Willow Creek jasper, Mann Creek, Lost River
499Carpenter, J. T.1950Idaho - The Gem State: The Mineralogist, v. 18, no. 1, p. 46, 48.
500Carr, R. W., and Fyfe, W. S.1958Some observations on the crystallization of amorphous silica: American Mineralogist, v. 43, p. 908-916.
501Carter, L.1958Rockhounding on Michigan's northern peninsula: Lapidary Journal, v. 12, no. 1, p. 98, 100.
502Carter, L. C.1976Rockhounding around Reno, Nevada: Gems and Minerals, no. 470, p. 46-47. NV, FT
503Carter, O. C. S.1904The petrified forests and painted desert of Arizona: Franklin Institute Journal, no. 157, p. 293-311.
504Carver, R. E.1980Petrology of Paleocene-Eocene and Miocene opaline sediments, South Eastern Atlantic Coastal Plain: Journal of Sedimentary Petrology, v. 50, no. xx, p. 569-582.
505Case, A. E.1949New Redtop Mountain Location: The Mineralogist, v. 17, no. 5, p. 254, 256, 258.
506Cash, C. H.1952Hunting for petrified wood in Colorado County, Texas: Earth Science Digest, v. 6, no. 2, p. 28-30.
507Casperson, W. C.1937Chalcedony and agate after Prehnite: Rocks and Minerals, v. 12, no. 7, p. 220.
508Casperson, W. C.1952Minerals of New Jersey: Private Publication. Paterson, New Jersey. 19 pp.
509Cassedanne, J. P. and J. O.1974Les Agates du Morro do Cristal: Bulletin de l'Association Francaise de Gemmologie. v. 36, p. 9-12.
510Cassirer, F. W.1936Theory of agate formation: The Mineralogist, v. 4, no. 9, p. 11-12.
511Cassirer, F. W.1937Agate found in many varieteis: The Mineralogist, v. 5, no. 6, p. 11, 12, 27. Bohemia, historical, varieties
512Cassirer, F. W.1937A mineralogical journey through Bohemia: Rocks and Minerals, v. 12, no. 1, p. 21-23. Mt Kazakov.
513Castro, D., and K. Castro1965Agate and opal at Hooton Ranch: Gems and Minerals, no. 335, p. 25. CA, FT
514Castro, K. M., and D. Castro1978Idar-Oberstein. Past and Present: Gems and Minerals, no. 484, p. 14-17, 36-43.
515Castro, K. M.1979The opals of Queretaro: Gems and Minerals, no. 504, p. 42.
516Cate, R. H.1977Agates of the Oregon Coast. A field guide of the what-where-when-how. Private Publication, 16 p.
517Catlin, M. F.1982The lava cast forest of Oregon: Lapidary Journal, v. 36, no. 6, p. 1002-1010.
518Chai, B. H. T.1974Mass transfer of calcite during hydrothermal crystallization: In Hoffman, A. W., Giletti, B. J., Yoder, H. S., Jr., and Yund, R. A., (Editors), Geochemical transport and kinetics: Carnegie Institute Washington Publication 634, p. 205-218. Peripheral, may delete, rkp.
519Chalmers, R. O.1968Australian rocks, minerals, and gemstones: American Elsevier Publishing Company, New York, 398 p.
520Chalmers, R. O.1969A new occurrence of precious opal of volcanic origin near Mullumbimby, New South Wales, Australia: Lapidary Journal, v. 23, no. 9, p. 1322.
521Champion, D. G.1965Comparison specimens for the identification of petrified wood: Gems and Minerals, no. 331, p. 26-27.
522Chandler, W. C.1935Mule Springs, California - An interesting locality for geodes, jaspers, and agates: Rocks and Minerals, v, 10, no. 5, p. 69. 27 mi E of Barstow, N 5 mi, Jasper Hill, agate E Hill, Jasper 45 mi E of Barstow, 6-7 mi W Ludlow
523Chandler, W. C.1943Some petrified wood occurrences in California: Rocks and Minerals, v. 18, no. 6, p. 169. Willard Creek, Lassen Co., Oroville, Butte Co., Egyptian jasper.
524Chandler, W. C.1956Agate Collecting on Northern California Beaches: Lapidary Journal, v. 10, no. 1, p. 62-66. Patrick's Point area
525Chaney, R. W.1948Ancient forests of Oregon: Oregon State System of Higher Education, Condon Lecture, Eugene, Oregon. 56 p.
526Chapman, E. W.1937Barstow desert localities described: The Mineralogist, v. 5, no. 1, p. 9-10, 111-114. Barstow Syncline, Rosamond Section in Antelope Valley and Red Rock Canyon, Upper Mio-L.Plio. Coral chalcedony, Afton Canyon, Myrickite, Opal Mt E of Hinkley, CA, Pb Pipe Spr, Black Canyon
527Chappell, I. J.1971The Prineville Pow Wow: Rock & Gem, v. 1, no. 2, p. 48-51.
528Chapman, J. R.1939Georgia hyalite opal: The Mineralogist, v. 7, no. 4, p. 184. Stone Mt., Georgia
529Chapman, J. R.1941Agate collections: The Mineralogist, v. 9, no. 3, p. 90, 91.
530Chapman, W. and Chapman, L.1935The petrified forest (Yellowstone National Park): Natural History, v. 35, no. xx, p. 382-392.
531Charles, R. J.1963It's Magic Time in Idar-Oberstein: Lapidary Journal, v. 17, no. 2, p. 289.
532Charles, R. J.1972The gold and gems of Panama: Lapidary Journal, v. 25, no. 10, p. 1356-1362, 1369-1371. Agate, wood, coral.
533Chatwin, S.1965Horn Coral, new Utah gem: Desert Magazine no?. 28, p. 54.
534Chauris, L.1991Localisation de la "foret sour marine" decouverte pres Morlaix per le Comte de la Fruglaye en 1811 [Discovery of the "submarine forest" near Morlaix by Count Fruglaye in 18110 Norois, v. 38, no. 152, p. 389-392. (English Summary)
535Chen, C. T. A. and Marshall, W. L.1982Amorphous silica solubilities IV. Behavior in pure water and aqueous sodium chloride, sodium, sulfate, magnesium chloride, and magnesium sulfate solutions up to 350o C: Geochimica et Cosmo-chimica Acta, v. 46, no. xx, p. 279-287.
536Chenard, G., and Chenard, D.1962Kern County Agate: Lapidary Journal, v. 16, no. 1, p. 106-107.
537Cheney, H. J.1963Visit to Deming, N. M: Rocks and Minerals, v. 38, no. 9,10, p. 531.
538Cheney, H. J.1969Deming's "Big Agate Diggings: Rocks and Minerals, v. 44, no. 9,10, p. 674-675.
539Chen Zhiquain and Den Yanhua1992The mineral composition of bloodstone: Journal of Guilin College of Geology, v. 12, no. 4, p. 356-366. (Chinese, with English summary).
540Childs, E.1950Washington Locality: The Mineralogist, v. 18, no. 3, p. 142, 144. Arlington, WA, area.
541Childs, E. T.1950Agate---what is it? Rocks and Minerals, v. 25, no. 7,8, p. 344. General lapidary properties.
542Chilingar, G. V.1956Distribution and abundance of chert and flint as related to the Ca/Mg ratio of limestones: Geological Society of America Bulletin, v. 67, p. 1559 - 1562.
543Chirvinskym P. N.1919Notice Relative 'a la Mineralogie de la Russie. Isvyestiya /Bulletin/ Polytechnical Institute Novocherkassk, v. 7, no. 2, p. 1-61.
544Chowns, T. M. and Elkins, J. E.1974The origin of quartz geodes and cauliflower cherts through the silicification of anhydrite nodules: Journal of Sedimentary Petrology, v. 44, no. 3, p. 885-903.
545Christensen, C.1972Opal fever: Earth Science, v. 25, no. 2, p. 89-94.
546Christensen, C.1973Return to the opal fields: Rocks and Minerals, v. 48, no. 5, p. 347-351.
547Christmanos, A.1950Electric Potential of Solutions as a Cause of the Formation of Leisegang Rings: Nature, no. 165, p. 238-239.
548Christopherson, F. E.1952Information on Montana Agate: Lapidary Journal, v. 6, no. 4, p. 256, 258, 260.
549Chrustchoff, B.1873On silicic acid and the silicification of woods: American Chemist, v. 3, no. 8, p. 281-286.
550Church, B. N.1995Several new industrial mineral and ornamental stone occurrences in the Okanagan - Boundary District (82E, 82L). In Exploration in British Columbia 1995, part A, Overview of exploration activity and part B, Geological Descriptions of properties. (Smyth, W. R., prefacer) Exploration in British Columbia, 1995, p. 123-130.
551Church, C. C.1959Cloverdale, Washington Locality: The Mineralogist, v. 27, no. 6,7,8, p. 107-108.
552Ciurca, S. J.1962Petrified Wood Society, (letter): Rocks and Minerals, v. 37, no. 9,10, p. 539.
553Ciurca, S. J.1963Agate and Opal in New York State: Gems and Minerals, no. 309, p. 34-36.
554Ciurca, S. J.1963Radioactive petrified wood: Rocks and Minerals, v. 38, no. 3,4, p. 158. UT
555Ciurca, S. J. and J. A. Lenhard1962Two rockhounds, a camper, & a month: Rocks and Minerals, v. 37, no. 1,2, p. 5-9
556Claremont, L.1918Some phases of silica: The watchmaker, jeweler, silversmith, and optician. January.
557Clark, E. C.1951Iris Agate...and Its Treatment: Lapidary Journal, v. 5, no. 4, p. 264-267.
558Clark, R.1998aSouth Dakota=s Fairburn Agate: Photography by Mary Jane Clark. Silverwind Agates, Palmer Publications, Inc., Amherst, WI, 80 p.
559Clark, R.1998bFairburn Collector and Trader: Silverwind Agates, Appleton, WI. Privately published newsletter.
560Clark, R.1999Fairburn Agates; treasures of Black Hills hunting: Rock and Gem, v. 29, no. 3, p. 80-82.
561Clayton, N.1980Abiquiu Agate: Gems and Minerals, no. 515, p. 42-45.
562Clayton, P. A. and Spencer, L. J.1934Silica-glass from the Libyan Desert: Mineralogical Magazine, v. 23, p. 501-508.
563Claytor, W. A.1984aThe long green land or Rocking Around New Zealand: Part One, Lapidary Journal, v. 38, no. 8, p. 1054-1062. FT
564Claytor, W. A.1984bThe long green land or Rocking Around New Zealand: Part Two, Lapidary Journal, v. 38, no. 9, p. 1178-1185. FT
565Clemson, D.1965Some British Columbia Agate: Lapidary Journal, v. 19, no. 4, p. 508. Robbins Creek Basalt.
566Clemson, D.1970Event at Monte Lake: Lapidary Journal, v. 24, no. 6, p. 836-838. "Agate Bluff" British Columbia, Canada
567Cleveland, L. J.1977Rocks in their heads and proud of it: Lapidary Journal, v. 31, no. 6, p. 1446-1448. general
568Cleveland, P.1822An elementary treatise on mineralogy and geology: Boston, Massachusetts. p. 267, 270, 302.
569Clinesmith, C. N.1936Blue agate in Washington: Rocks and Minerals, v. 11, no. 9, p. 136
570Coate, E. J.1936Boulder opal: The Mineralogist, v. 4, no. 4, p. 24. Queensland, Aust.
571Cockburn, A. M.1869Brief Notes on the Precious Stones and Pearls of Scotland: Transactions of the Edinburgh Geological Society, v. 1, part 2, p. 196-198.
572Cockrell, R.1986Bones of agate; an administrative history of Agate Fossil Beds National Monument: Midwest Regional Ofice, Office of Planning Resource Preservation, Division of Cultural Resources Management, National Park Service, U. S. Department of the Interior, 311 p.
573Coetzee, C. B.1976(Editor) Mineral Resources of the Republic of South Africa: Fifth Edition, Handbook 7, Department of Mines, Geological Survey, Republic of South Africa, 462 p.
574Coffing, W. P., Mrs.1956North Dakota localities: The Mineralogist, v. 24, no. 3, p. 103.
575Coffman, R.1979Nature's Saddle Mountain Fire Sale: Lapidary Journal, v. 32, no. 11, p. 2504-2507. Washington.
576Cohen, A. J., and Sumner, G. G.1958Relationship among impurity contents, colour centers and lattice constants in quartz: American Mineralogist, v. 43, p. 58-68.
577Cohen, E.1875Title not known: Neues Jahrbuch fur Mineralogie, cited in Walker and Parsons, 1922 and describes ASpike Amygdules@ in Basutuland, Africa, which are called Pipe Aamygdales@ by Walker and Parsons.
578Colbourn, K.1956Louisians full of petrified wood: Rocks and Minerals, v. 31, no. 5,6, p. 238-239. Reprinted from Shreveport, Louisiana Times, March 4, 1956.
579Colburn, L.1945Priday's Ranch, Oregon: Rocks and Minerals, v. 20, no. 11, p. 531. Plume, S. side Pony Butte, Polkadot, N. side Pony Butte. OR, FT
580Colburn, R.1998The Formation of Thundereggs: Basin Range Volcanics Geolapidary Museum, Deming, New Mexico, 15 p. Electronic publication at:
581Cole, B.1956Opal, in The Gem Collector: Rocks and Minerals, v. 31, no. 5,6, p. 266-267.
582Cole, B.1957The Quartz Gems (Part 2 - the Crypto-crystalline Forms): Rocks and Minerals. Whole 260. v. 32, no. 9, 10, p. 473-474. survey
583Cole, F.1973Virgin Valley?: Lapidary Journal, v. 27, no. 9, p. 1467-1468. Virgin Valley Wood, Opalite
584Cole, L. J.1970Texas Sized Agate: Lapidary Journal, v. 24, no. 2, p. 396-397. Balmorhea Agate
585Coleman, T.1959Gem and mineral collecting in the Transvaal: Rocks and Minerals, v. 34, no. 2, 3, p. 114-115. Vaal River, moss agate, picture jasper, blue chalcedony.
586Colhour, O. M.1956Heap Big Fire; No Smoke: Lapidary Journal. v.10, no. 2, p. 136, 138, 140, 142.
587Colhour, O. M.1957The Agate Egg and I: Lapidary Journal, v. 10, no. 6, p. 504, 506, 508.
588Colhour, O. M.1961How I Carve Rare Fire Agates; Carving the Safford Arizona Fire Agate: Lapidary Journal, v. 15, no. 1, p. 33-36.
589Collini, C.1776Tagebuch einer Reise, welches verscheidene mineralogische Beobachunger, beson-ders uber die Achate und den Basalt ehnalt, 578 pp. (Not seen).
590Collins, C.1959aHunting Agates in Oregon: Lapidary Journal, v. 13, no. 3, p. 465-466.
591Collins, C.1959bNational gem fair - field tour: The Mineralogist, v. 27, no 6, 7, 8, p. 99-100. Clear Creek Green Mountains, WA
592Collins, C.1959cClear Creek, Oregon: The Mineralogist, v. 27, 6,7,8, p. 114. Oregon.
593Collins, R.1965Horse Canyon revisited: Lapidary Journal, v. 19, no. 1, p. 192-195. California, Horse Canyon Agate,
594Collins, R., and Collins, D.1965Grinding and polishing large petrified wood specimens: Gems and Minerals, no. 332, p. 24-27.
595Condra, G. E., E. C. Reed, and O. J. Scherer1940Correlation of the formations of the Laramie Range, Hartville Uplift, Black Hills, and Western Nebraska: Nebraska Geological Survey, Conservation and Survey Division, University of Nebraska. Bulletin 13. 52 p.
596Condra, G. E.1950Correlation of the formations of the Laramie Range, Hartville Uplift, Black Hills, and Western Nebraska; (Revised by G. E. Condra and E. C. Reed): Nebraska Geological Survey, Conservation and Survey Division, University of Nebraska, Bulletiun 13. 52 p.
597Conkey, S. Y.1977A Method of Grading Fire Agate: Lapidary Journal, v. 31, no. 8, p. 1860-1862.
598Connolly, J. P., and Oharra, C. C.1929The mineral wealth of the Black Hills: South Dakota School of Mines, Bulletin 16, 418 p. Lame Johnny Creek, near Fairburn.
599Conrad, T. A.1846Observations on the Geology of a part of East Florida, with a catalogue of the Recent shells of the coast: American Journal of Science, 2nd Series, v. 2, p. 36-48.
600Cook, C.1969Gifts from the glaciers: Lapidary Journal, v. 23, no. 9, p. 1214-1215, 1226-1233.
601Cook, K. H., and Cook, W. A.1967aThe origin of geodes, Part I: Gems and Minerals, no. 357, p. 14-17.
602Cook, K. H.1967bThe origin of geodes, Part II: Gems and Minerals, no. 358, p. 18-20.
603Cook, M. D.1971Exploring the Roadcut, Route 66, Connecticut: Rocks and Minerals, v. 46, p. 189.
604Cook, R., Mrs.1961Nebraska, in World news on mineral occurrences, (letter): Rocks and Minerals, v. 36, no. 9,10, p. 481. chalcedony pseudo after gypsum.
605Cooke, C.1976A favorite gem material: Lapidary Journal, v. 30, no. 9, p. 2170-2179. Pet wood, general.
606Cooke, C.1982Collecting gemstones in Wyoming: Lapidary Journal, v. 36, no. 1, p. 228-234.
607Cooke, C. E.1980The rainbow of quartz: Lapidary Journal, v. 33, no. 11, p. 2428-2433. General
608Cooke, G. W., and Mossom, S.1929Geology of Florida: Florida State Geological Survey. 20th Annual Report, 227 p.
609Cooper, C. W.1924The precious stones of the Bible: London. xx p. (not seen, pagination not known)
610Cooper, E. M.1978Opal mine tour: Lapidary Journal, v. 32, no. 4, p. 994-997. Queretaro
611Cooper, I.1976Letter from a Loner: Gem Craft. August, p. 513-514.
612Copeland, L. L.1972/1973The Derivation of Gem Names: Gems and Gemmology, v. 14, no. 4, p.118-125.
613Copeland, P. G.1970Pebble collecting on the Yorkshire Coast: Gems and Minerals, no. 390, p. 24-28, 42, 43.
614Copisarow, A. C., and Copisarow, M.1942Silica and the Liesegang Phenomenon: Nature, no. 149, p. 413.
615Copland, J.1819Account of the Carnelian Mines in the neighbourhood of Broach: Transactions of the Literary Society of Bombay, v. 1, p. 289. India, carnelian at Rajpipla State.
616Copley, A. J.1972A photographic study of Brazilian Agate: Rocks and Minerals, v. 47, no. 7, 8, p. 498-499. Acetate peels and prints from them.
617Coquand, G.1848Description des terrains primaries et ignes du departement du Var: Memois Societe Geologique France (2), v. 3.
618Correns, C. W.1941Uber die Loslichkeit von Kieselsaure in schwach sauren und alkalischen Losungen: Chemie der Erde, v. 13, p. 92-96.
619Correns, C. W.1949Einfuhrung in die Mineralogie: Springer Verlag, Berlin, Gottingen, Heidelberg. (not seen) Berlin, english Edition, 1969?
620Correns, C. W.1950Zur Geochemie der Diagenese: Geochimica et Cosmochimica Acta, v. 1, no. xx, p. 49-54.
621Correns, C. W.1961The experimental weathering of silicates: Clay Mineral Bulletin, v. 4, p. 249-265.
622Correns, C. W.1967Diagenese und Fossilisation: In Brinkman, R. (Editor) Lehrbuch der allgemeine Geologie, Band III, Stuttgart, S., p. 171-213.
623Correns, C. W., and Nagelschmidt, G.1933Uber Faserbau und optische Eigenschaften von Chalzedon. Zeitschrift Kristallographie, v. 85, no. xx, p. 199-213.
624Corwin, J. F.1958Hydrothermal reactions under supercritical conditions V. Journal of Physical Chemistry, v. 62, no. xx, p. 1086-1088.
625Corwin, J. F., Yalman, R. G., Edwards, J. W., Owen, G. R. and Shaw, B. R.1957Hydrothermal reactions under supercritical conditions, I, II, IV: Journal of Physical Chemistry, v. 62, p. 939, 941, 1437.
626Courter, W. E.1977Michigans favorite gemstone: Lapidary Journal, v. 31, no. 1, p. 150-158.
627Cousen, T. W.1953Opal trails in Old Mexico: The Mineralogist, v. 21, no. 3, 99-103.
628Cousen, T. W.1956Mexican Fire Opal: Gems and Minerals, v. 24, no. 3?, p. 16, 17, 68-71.
629Cox, C. M.1994Evidence for silica replacement of evaporites in the Pennsylvanian Ismay interval in the Paradox Basin. [abstract]: In Abstracts with Programs, Geological Society of America, Rocky Mountain Section, 46th Annual Meeting, Durango Coloraod, May 4-6, 1994, v. 26, no. 6, p. 9.
630Cox, K. G., Bell, J. D., and Pankhurst, R. J.1979The interpretation of igneous rocks: G. Allen and Unwin, London, Boston, 450 p.
631Cramer, E.1892Uber die Fluchtigkeit der Kieselsaure: Zeitschritf angew. Chem. Jg, 1892, v. xx, no. yy, p. 484-486.
632Crawford, B. J.1967Famous Flint Ridge Flint: Earth Science, v. 20, no. 3, p. 118-119. Ohio
633Crawford, B. J.1973Flintridge, Ohio: Lapidary Journal, v. 27, no. 3, p. 528-532. historical, lapidary
634Crippen, R.1998Deep in Nevada; there are still some little known but productive gem and mineral sites: Rock and Gem, v. 28, no. 5, p. 80-83.
635Crippen, R. A.1948Unusual Concretions from Templeton, San Luis Obispo County, California:.California Divisions of Mines and Geology Bulletin, v. 44, no. 3, p. 249-252. Biconoids, Paso Roble Thunder Eggs. Reprinted in Hobbies magazine, v. 53, January, 1943, no.11, p. 151, 152.
636Cronstedt, A. F.1770An Essay toward a system of Mineralogy by Axel Fred Cronstedt: translated from the Original Swedish with notes by Gustav von Engestrom...the whole revised and corrected, with some additional notes by Emanuel Mendes da Costa. London.
637Crooks, E. R.1977A visit to the lost Deer Hunt Opal Mine: Lapidary Journal, v. 31, no. 8, p. 1828.
638Cross, B.1996The Agates of Northern Mexico: Burgess International Group, Inc., Burgess Publishing, Edina, Minnesota, 201 p.
639Cross, L.1977Coober Pedy today: Gems and Minerals, no. 459, p. 8, 9, 43, 45.
640Cross, W. C.1891Constitution and origin of spherulites in eruptive rocks: Bulletin, Philosophical Society of Washington, v. XX, p. 411-444. (Not seen).
641Crow, M.1995The Rockhound'S Guide to New Mexico: Falcon Press Publishing Company, Helena, Montana, 156 p.
642Crowe, M. W.1973Australian gemstone production: Lapidary Journal, v. 27, no. 8, p. 1200-1204.
643Crowns, B. C.1974America's Stone Age "Lapidaries": Lapidary Journal, v. 28, no. 5, p. 840-848. Archeological
644Cuddy, B.1974"The Agate Desert": Lapidary Journal, v. 28, no. 2, p. 428-433. Agate Post Office, Oregon, Check usgs data base, rkp
645Cunningham, J. L.1954aLake Superior Agates, Part I: Gems and Minerals, no. 200, p. 14, 16.
646Cunningham, J. L.1954bLake Superior Agates, Part II: Gems and Minerals, no. 201, p. 154-59.
647Cunningham, J. L.1959Redtop Mountain Blue Agate: Gems and Mineals, no. 263, p. 14-17.
648Cunningham, J. L.1961aLake Superior Agate, Part I: Lapidary Journal, v. 15, no. 2, p. 330-337.
649Cunningham, J. L.1961bLake Superior Agate, Part II: Lapidary Journal, v. 15, no. 3, p. 220-235.
650Currier, R. H.1997Amethyst, agate and calcite "skunks" from Uruguay: Rocks and Minerals, v. 72, no. 2, p. 94-105.
651Curry, D.1976Enhydros X-rayed: Lapidary Journal, v. 30, no. 8, p. 1921. X-ray pictures.
652Curtis, D., and Dare, D.1993State Stones and Other State Symbols: Southern Illinois Earth Science Club, Inc., Murphysboro, IL, 101 p.
653Cuthbert, D. L.1969Precious Opal, Queen of Gems in Idaho: Lapidary Journal, v. 23, no. 7, p. 928-930. Spencer opal
654Cutler, V. P.1940Huge "Thunder Eggs" found: The Mineralogist, v. 8, no. 6, p. 259-260. SW Blythe, Little Mule Mt.
655Cutler, V. P.1945Study moss agate: The Mineralogist, v. 13, no. 2, p. 77-78.
656Czaja, M.1985 [1986]Determination of the crystalinity of chalcedonies: Mineralogia Polonica, v. 16, no. 1, p. 15-26.
657Czaja, M.1992Wynikie badan strukturalnych kwarcow I chalcednov z bazaltiodow w lubiechowej (Gory Kacazwskie): [Structure of quartz and chalcedony from Lubiechowa basalts, Kaczyawa Mountains]: Prace Mineralogczne, no. 82, p. 570? (English Summary) aczyawa Mountains]: Prace Mineralogczne, no. 82, p. 570? (English Summary)