Agates Bibliography

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2514 Pabian, R. K. 1970a Gemstone occurrences in Nebraska [Abstract]: Nebraska Academy of Sciences, Proceedings, 80th Annual Meeting, p. 35 - 36.
2515 Pabian, R. K. 1970b Record in Rock, a handbook of the Invertebrate Fossils of Nebraska: University of Nebraska, Conservation and Survey Division, Educational Circular 1, 99p.
2516 Pabian, R. K. 1971 Minerals and Gemstones of Nebraska: Conservation and Survey Division, University of Nebraska, Educational Circular 2, 80 p.
2517 Pabian, R. K. 1975 Collecting Nebraska's Colorful Agates: Farm, Ranch, and Home Quarterly, University of Nebraska, Institute of Agriculture and Natural Resources. Summer, 1975, 2 p.
2518 Pabian, R. K. 1977 Inclusions in agates from the Late Precambrian Keweenawan Basalts of the Lake Superior Region, Minnesota and Michigan: Proceedings, Nebraska Academy of Sciences. 87th Annual Meeting, April 15-16, 1977. [Abstract], p. 42-43.
2519 Pabian, R. K. 1978 Inclusions in Agates and Their Origins and Significance: Gems and Gemology, v. 16, no. 1, p. 16-28.
2520 Pabian, R. K. 1980a Lake Superior Agates: a Historical Review: Lapidary Journal, v. 34, no. 1, p. 110-120, 146-153.
2521 Pabian, R. K. 1980b Gem Collecting in Nebraska: Lapidary Journal, v. 34, no. 2, p. 462 - 476. Nebraska Blue Agate, Fairburn Agates, Deuel County, Palm Wood, Laker Superior Agates, Jasper, Honey Agate.
2522 Pabian, R. K. 1980c Lake Superior Agates: Characteristic Structures and Inclusions: Lapidary Journal, v. 34, no. 6, p. 1284-1299.
2523 Pabian, R. K. 1980d Nebraska Portfolio: Rocks and Minerals, v. 55, no. 3, p. 107-108.
2524 Pabian, R. K. 1982a Inclusions in agates from the late Precambrian (Keweenawan) basalts from the Lake Superior Region, Minnesota and Michigan: Symposium Proceedings. Scottish Mineral and Lapidary Club, Royal Scottish Museum, Chambers Street, Edinburgh. p. 64-75.
2525 Pabian, R. K. 1982b Rivers, rockhounds, canoes, and collecting: Lapidary Journal, v. 36, no. 1, p. 76-82. Color photographs, chert, Deuel County Wood, Honey Agates, Lake Superior Agates, Jaspers, in place materials.
2526 Pabian, R. K. 1998 Recognition of ancient chalcedony filled spherulites, or in search of ancient thunder eggs: Proceedings, Nebraska Academy of Sciences, 108th Annual Meeting, p. 50.
2527 Pabian, R. K., and A. Zarins 1991 Chaos and Fractals as Explanations for the Origins of Certain Structures and Inclusions in Agates: Proceedings, Nebraska Academy of Sciences, 101st Annual Meeting, p. 61.
2528 Pabian, R. K., and A. Zarins 1991 1992a Accessory Mineralization in Amygdaloidal Agates: An Overview: Proceedings, Nebraska Academy of Sciences. 102nd Annual Meeting. p. 70.
2529 Pabian, R. K., and A. Zarins 1991, 1992b Stratigraphic Distribution and Environments of Deposition Relating to the Origin of Banded Agates: Abstracts with Programs. Geological Society of America. North Central Section. Iowa City, Iowa. April 30, May 1, 1992, v. 24, no. 3, p. 58.
2530 Pabian, R. K., and A. Zarins 1991, 1994 Banded Agates: Origins and Inclusions: Univerrsity of Nebraska Conservation and Survey Division, Educational Circular 12, 32 p.
2531 Packer, C. S. 1969 Jasp-Agate inspires new hobbyist: Lapidary Journal, v. 23, no. 6, p. 888-890.
2532 Page, V. M. 1960a How to identify fossil wood: Gems and Minerals, no. 270, p. 18-23
2533 Page, V. M. 1960b How to identify fossil wood: Gems and Minerals, no. 271, p. 24-31
2534 Page, V. M. 1960c How to identify fossil wood: Gems and Minerals, no. no. 272, p.23-27
2535 Page, V. M. 1960d How to identify fossil wood: Gems and Minerals, no. 273, p. 29-32
2536 Page, V. M. 1960e How to identify fossil wood: Gems and Minerals, no. 274, p. 23-28: no. 275, p. 23-27.
2537 Page, V. M. 1960f How to identify fossil wood: Gems and Minerals, no. 275, p. 23-27.
2538 Pagnucco, J. W. 1959 Flint Ridge Flint: Earth Science, v. 12, no. 3, p. 89-92. Ohio.
2539 Pallister, H. D. 1955 Index to the minerals and rocks of Alabama: Geologoical Survey of Alabama, Bulletin 65. 55p.
2540 Palmer, A 1963 Much ado about nothing or --- how not to find opals: Lapidary Journal, v. 17, no. 3, p. 408.
2541 Palmer, W. C. 1981 Portland regional gem show: Lapidary Journal, v. 35, no. 7, p. 1472-1473. "Stinkingwater" oak.
2542 Palmer, W. S. 1935 Gold in petrified wood: Rocks and Minerals, v. 10, no. 7, p. 102-103. Nevada.
2543 Pannuti, U. 1980 Le Gemme: in Sansoni, G. C. (editor), Il Tesoro di Lorenzo il Magnifico: Stabilimento Grafico Commerziale, Firenze, p. 1-124.
2544 Papke, H. A. 1908 A visit to the mineral localities at Paterson and Great Notch, N. J: The Mineral Collector, v. 15, no. 8, p. 114.
2545 Parker, M. C. 1941 Montana dendrites: The Mineralogist, v. 9, 7, p. 254-255.
2546 Parker, R. E. 1963 Hunting fire agates and opals in Mexico: Lapidary Journal, v. 17,no. 7, p. 740.
2547 Parkinson, J. 1901 The hollow spherulites of the Yellowstone and Great Britain: Quarterly Journal of the Geological Society of London, v. 57, p. 211-225.
2548 Parks, G. A. 1984 Surface and interfacial free energies of quartz. Journal of Geophysical Research, v. 89, no. B6, p. 3997-4008.
2549 Parliman, C. R. 1960 New agate fields in old Mexico: Lapidary Journal, v. 14, no. 1, p. 4, 5, 7. High Fidelity Agate, Dog's Head Agate.
2550 Parsons, A. L. 1934 The utilization of semi-precious and ornamental stones of Canada: University of Toronto Studies, Geological Series, no. 36, Contributions to Canadian Mineralogy for 1934, p. 13-21, plate III. Scots Bay, Nova Scotia agate illustrated.
2551 Parsons, A. L. 1938 Additional semi-precious and ornamental stones of Canada: University of Toronto Studies, Geological Series, no. 41, p. 45-48.
2552 Parsons, C. J. 1965 Practical Gem Knowledge for the Amateur, part 11 of a series: Lapidary Journal, v. 19, no. 6, p. 694-700.
2553 Parsons, C. J. 1967a Practical Gem Knowledge for the Amateur, part 33-A of a series: Lapidary Journal, v. 21, no. 6, p. 794-799. Hauser Bed, Wiley Well, Crazy Lace, Panama, Potato Patch, Priday, Buddstone, Coon Hollow, all illustrated.
2554 Parsons, C. J. 1967b Practical Gem Knowledge for the Amateur, part 33-B of a series. Lapidary Journal, v. 21, no. 7, p. 894-899. Nipomo Pyrite, Turitella, Bog Jasper from California, illustrated.
2555 Patton, H. B. 1896 Concretions of chalcedony and opal in obsidian and rhyolite in Colorado: Reprinted from a paper presented at the November 4, 1895 meeting, Golden Colorado, Colorado Scientific Society Proceedings, no. 5, p. 165-170. Del Norte area.
2556 Patton, J. W. 1936 The Mint Canyon Agate Beds in California: Rocks and Minerals, v. 11, no. 9, p. 156-159.
2557 Patton, J. W. 1938 Thunder Eggs: Rocks and Minerals, v. 13, no. 12, p. 370-372. California, Opal Mountain, Hankley.
2558 Pauling, L. 1980 The nature of silicon - oxygen bonds: American Mineralogist, v. 65, p. 321-323.
2559 Pavlov, G. F., and Vorsepnev, V. V. 1992 Chalcedonian mineralization in North-East Russia [abstract]: in International Conference on Arctic Margins, K. V. Tracy et al, editors, ICAM, Anchorage, Alaska, p. 48. Meeting, September 2-4, 1992, Anchorage, Alaska.
2560 Pearce, E. W. 1966 A feminine view of rock-hunting: Rocks and Minerals, v. 41, no. 8, p. 584-587. Nova Scotia
2561 Pearl, R. M. 1942a Chalcedony in Colorado , (Part I): The Mineralogist, v. 10, no. 1, p. 7, 8, 29, 30. Curio Hill, 6.5 miles South of Canon City, Fremont County, bloodstone.
2562 Pearl, R. M. 1942b Chalcedony in Colorado, (Part II): The Mineralogist, v. 10, no. 3, p. 75, 76, 98, 99.
2563 Pearl, R. M. 1948 Two Colorado Mineral localities: The Mineralogist, v. 16, no. 10, p. 453-455. Austin Bluffs, East of Colorado Springs.
2564 Pearl, R. M. 1953a A Colorado Petrified forest: The Mineralogist, v. 21, no. 4, p. 147 - 151.
2565 Pearl, R. M. 1953b Colorado gem trails, 2nd edition: Mineral Book Company, Box 183, Colorado Springs, Colorado. 125 p.
2566 Pearl, R. M. 1964 American Gem Trails: McGraw-Hill Book Company, New York. 175 p.
2567 Pearl, R. M. 1965 Colorado gem trails and mineral guide: ?2nd revised edition. Sage Books, Denver, Colorado. 223 p.
2568 Pearl, R. M. 1978 How to tell synthetic opal: Earth Science, v. 31, no. 4, p. 153.
2569 Pearsall, H. E. 1948a An 8000 Mile Gem Collecting Trip. Part 1. Lapidary Journal, v. 1, no. 4, p. 182, 184, 188-191.
2570 Pearsall, H. E. 1948b An 8000 Mile Gem Collecting Trip, Part 2: Lapidary Journal, v. 2, no. 1, p. 34, 36, 38-42.
2571 Pearsall, H. E. 1948c An 8000 Mile Gem Collecting Trip, Part 3: Lapidary Journal, v. 2, no. 2, p. 110, 112, 114, 115.
2572 Pearsons, H. L. 1964 More B. C. Gem Trails: Monte Lake Rock Shop, Monte Lake, British Columbia, Canada. 38 p.
2573 Pearsons, H. L. 1968 B.(ritish) C.(olumbia) Gem trails , (3rd edition): 30 pp. (no more data).
2574 Peck, D. L. 1964 Geologic Reconnaissance of the Antelope-Ashwood Area North-Central Oregon: U. S. Geological Survey Bulletin 1161-D, 26 p.
2575 Pederson, B. C., and Pederson, C. M. 1961 Montana agate...a most fascinating gemstone: Lapidary Journal, v. 15, no. 2, p. 254-255. Reprinted in Agates of North America, fill in details, RKP.
2576 Pelto, C. R. 1956 A study of chalcedony: American Journal of Science, no. 254, p. 32-50.
2577 Pence, V., and B. Stewart 1960 The Canal Zone Gem and Mineral Society's field trip to Panama's Prelas Islands, December 5 & 6, 1959. Rocks and Minerals, v. 34, no. 9, 10, p. 435-439.
2578 Pendergast, D. M. 1969 Ancient Mayan Lapidaries: Lapidary Journal, v. 23, no. 8, p. 1132-1146.
2579 Peng, C. J., and Amstutz, G. C. 1971 Limonitic Banding in a Rhyolitic Welded Tuff. Chemie der Erde, v. 29, p. 259-276.
2580 Pense, J. 1956/1957 Achat unter dem Elektronen-mikroskop: Zeitschriften Deutsches Gesselschaft fur Edelsteinkde., v. 18, p. 7-10. (Not seen).
2581 Pense, J. 1959 Zum electronenmikroskopischen Faserbau des achates: Zeitschriften Deutsches Gesselschaft fur Edelsteinkunde, v. 27, p. 3-4. (Not seen).
2582 Pense, J. 1961, 1962 Electronmfikroskopische Untersuchungen zur Fasertextru des Achates: Zeitschriften Deutsches Gesselschaft fur Edelsteinkunde, v. 38, p. 12 - 30. (Not seen).
2583 Pense, J. 1964 Zur sublichtmikroskopischen Morphologie des Chalcedons: Fortschritte Mineralogie, v. 41, p. 166. (Not seen).
2584 Pense, J. 1966 Zur sublichtmikroskopischen Morphologie des dryptokristallinen Silicumdioxids: Habilitationschrift. Mainz. (Not seen).
2585 Pepper, S. J. 1980 Beachcombing in southern California: Gems and Minerals, no. 514, p. 36.
2586 Pepper, S. J. 1981a A visit to the Gingko Petrified Forest, Washington: Lapidary Journal, v. 35, no. 5, p. 1050-1052.
2587 Pepper, S. J. 1981b California rockhound visits Florida: Lapidary Journal, v. 35, no. 7, p. 1484-1488.
2588 Pepper, S. J. 1982 A carefree adventure: Lapidary Journal, v. 36, no. 6, p. 1104-1105. Cave Creek, Arizona.
2589 Perkins, E. H. 1922 A catalogue of Maine Minerals. Maine Naturalist, v. 2, p. 43-47, 95-95, 159-162. (Not seen in its entirety).
2590 Perkins, E. H. 1924 A catalogue of Maine Minerals: Maine Naturalist, v. 4, p. 45 - 49, 110-115. (Not seen in its= entirety).
2591 Perkins, G. H. 1931 Minerals of Vermont: State Geologist, 17th Annual Report for 1929, 1930. Burlington, Vermont. p. 151-178.
2592 Perry, H. 1959 Historic Idar-Oberstein: Earth Science, v. 12, no. 1, p. 13-14. Lapidary article.
2593 Perry, L. 1976a The Opal Hill Fire Agate Mine: Gems and Minerals, no. 461, p. 56, 57, 77.
2594 Perry, L. 1976b Agate in Augustine Canyon: Gems and Minerals, no. 469, p. 48-49. California, field trip.
2595 Perry, L. 1979 There are gems in those "worked out" fields: Gems and Minerals, no. 505, p. 24.
2596 Perry, L. 1984 Wiley Well revisited: Gems and Minerals, no. 565, p. 67-71.
2597 Perry, L. E. 1961 Varied agate types and locations in California: Lapidary Journal, v. 15, no. 3, p. 308-314.
2598 Perry, N. & R. 1967 Australian Gemstones in Colour: Charles E. Tuttle Company, Rutland, Vermont, and Tokyo, Japan. 112 p. Color illustrations, Queensland Agate Blue agate, Carnelian, Chalcedony, Chert, chrysoprase, opal, ribbonstone, boulder opal, jelly opal, blue moss opalite, goldlace opalite, opalised (sic.) wood, petrified wood. Tasmania, Mt. Isa, Queensland. Murgan? district?
2599 Perry, O. P. A., Rev. 1950 Eden Valley Wood is Different: Lapidary Journal, v. 4, no. 1, p. 16, 18, 20, 22, 24, 26. Probably the same person as O. P. Avery who advertizes Eden Valley wood on page 26, above.
2600 Persiel, E. A., Smith, D. C., Photiades, A. D., and Zindors, G. 1996 Preliminary data from the Raman spectroscopy of different forms of SiO2 in Mn-rich banded cherts from two regions of the Peloponnese, Greece [Abstract]: Terra Nova Abstract Supplement, v. 2, p. 10.
2601 Person, R. A. 1975 Crazy Lace near Francois Lake, British Columbia: Lapidary Journal, v. 29, no. 9, p. 1730-1736.
2602 Person, R. A. 1976 Agate on Flaking Stone Mountain: Gems and Minerals, no. 462, p. 10, 71-73. New Mexico, field trip.
2603 Person, R. A. 1977a Rockhound honeymoon: Lapidary Journal, v. 30, no. 12, p. 2694-2698. South Dakota, Oregon, vistaite, Prineville area.
2604 Person, R. A. 1977b Rockhunting with the tides near Parsboro, Nova Scotia.: Lapidary Journal, v. 31, no. 1, p. 126-136. Color Illustrations, Gold Plume Agate.
2605 Person, R. A. 1977c Rainbows of agate in Scots Bay, Nova Scotia: Lapidary Journal, v. 31, no. 2, p. 482-488. Color illustrations, rainbows of agate, gold moss agate.
2606 Person, R. A. 1977d Walk to an island for gemstones and crystals: Lapidary Journal, v. 31, no. 3, p. 690-695, 712-714. Color illustrations.
2607 Peters, E. G. 1947 A Woman Rockhound in Central Oregon: Lapidary Journal, v. 1, no. 1, p. 30-31. Field Trip
2608 Peters, M. F. 1966 Connoisseur of Bola Ties: Lapidary Journal, v. 19,no. 10, p. 1108 -1110. Colored photos.
2609 Petersen-Fagerstam, W. 1953 Modern Agate Costume Jewelry: Lapidary Journal, v. 6, no. 6, p. 462-463.
2610 Peterson, B. M. 1972 Pete Curto's Copper Country: Lapidary Journal, v. 26, no. 9, p. 1304-1308. Lake Superior Agate.
2611 Peterson, I. 1988 The Mathematical Tourist, snapshots of modern mathematics: W. H. Freeman and Company, New York. 240 p.
2612 Peterson, J. V. 1965 The Columbian Plateau: Earth Science, v. 18, no. 5, p. 200 - 203. Oregon, Washington, petrified wood.
2613 Petkof, B. 1964-1966 U.S. Bureau of Mines, Minerals yearbooks: Mineral facts and problems, 1965 edition.
2614 Petmecky, B. J. 1960 Rock hunting in Meixco: Lapidary Journal, v. 14, no. 1, p. 42, 44, 46-47.
2615 Petrusenko, Svetoslav 1991 Kamienie szlachetne i ozdobne Bulgarii [Precious stones and ornaments of Bulgaria]: Mineralogia Polonica, v. 22, no. 1, p. 81-88.
2616 Pettijohn, F. J. 1975 Sedimentary Rocks: Harper and Row, 628 p.
2617 Petzold, A., and Hinz, W. 1979 Silikatchemie: Stuttgart.(No further details, seen cited, but not seen).
2618 Phetteplace, J. 1959 Practical Lapidary Hints: Earth Science, v. 12, no. 6, p. 198-200. Picture jaspers, cutting , field collecting.
2619 Phillips,J. A. 1873 Note on the silicified woods of California: Geololgical Magazine, v. 10, first series, p. 98-99.
2620 Phillips K. W. 1844 An elementary treatise on mineralogy, 5th Edition: Descriptive Mineralogy, Pt. 2. p. 10-16. William D. Ticknor & Co., Boston, 662 p. Numerous old-world localities.
2621 Pickering, K. L. 1981a In quest of the North Fife Hills: Gems, v. 13, p. 23 - 25.
2622 Pickering, K. L. 1981b The Dulcote Agates: Gems, v. 13, no. 5, p. 29-32.
2623 Pierce, M. L., and Christie, J. M. 1987 Kinetics of grain growth in quartz aggregates, [Abstract]: EOS Transactions of the American Geophysical Union, v. 68, no. 16, p. 422.
2624 Piezcka, A., and Holcer, Z. 2000 Agates of the Cracow region compared with other occurrences I Poland: in Geology and Petrology of the Upper Silesia and the Malopolska terranes boundary zone: papers of the 7th meeting of the Petrology Group of the Mineralogical Society of Poland (Wyszomirski, P., editor) Prace Specjalne-Polskie Towarzystwo Mineralogiczne 17, p. 60-62.
2625 Pilipenko, P. P. 1934 Zur Frage der Achatengenesis (russ. mit dt. Zusammenf.): Bulletin Societie Naturalistes de Moscou, Sect. geol. v. 12, p. 279-299. (Not seen). [Russian with German ?Translation].
2626 Pisciotto, K. A. 1981 Diagenetic trends in the siliceous facies of the Monterey Shale in the Santa Maria region, California: Sedimentology, v. 28, no. 4, p. 547-571.
2627 Pitman, S. S., Jr. 1959 Silica in Edwards Limestone, Travis County, Texas: Silica in Sediments: Special Publication Society of Economic Paleontologists and Mineralogists and American Association of Petroleum Geologists, p. 121-124.
2628 Platen, P. 1908a Untersuchung fossiler Holzer aus dem Western Vereinigten Staaten von Nordamerika: Universitat Leipzig. Innaugural Dissertation, Philosophischen Fakultat, separately issued, Gressner and Schramm. 156 p.
2629 Platen, P. 1908b ibidem: Naturforschende Gesselschaft zu Leipzig, Sitsungsberichte v?. 34 p. 1-164.
2630 Platen, P. 1909 Die fossilen Walder am Amethyst-Mount im Yellowstone-Nationalpark und die mikroskopische Untersuchung ihrer Holzer: Prometheus, v. 20, p. 241 - 246. (Not seen).
2631 Platt, R. E. 1955a New Wyoming petrified forest: The Mineralogist, v. 23, no. 2, p. 68-70.
2632 Platt, R. E. 1955b A Rock Journey in Wyoming: Lapidary Journal, v. 9, no. 1, p. 68-71. Muddy Gap, Home on the Range, Riverton, SW Wyo, Wind R.
2633 Playfair, J. 1802 Illustrations of the Huttonian Theory of the Earth: William Creech, Edinburgh, p. 78-79.
2634 Pliny the Elder ca. 79 Historia Naturalis: Numerous translations available.
2635 Plodowski, G., and Werner, R. 1981 Achate: Kleine Senckenberg-Reihe, No. 12, 39 p.
2636 Pluard, N. 1978 Our three month trek: Lapidary Journal, v. 32, no. 9, p. 1952-1963. Field trip, Wyoming's Red Desert, Blue Forest.
2637 Pluard, N. 1984 Arizona---second time is best: Lapidary Journal, v. 38, no. 8, p. 1124-1131.
2638 Plyusnina, I. I. 1978 Study of structural disorder of chalcedonies by infrared spectroscopy: Soviet Physic. Doklady., v. 23, no. 6, p. 363-365.
2639 Plyusnina, I. I. 1979 Infrared study of cryptocrystalline formations of silica, I: Chalcedonies, Arch. Mineral. v. 35, no. xx, p. 19-31.
2640 Plyusnina, I. I., and Sergeeva, N. E. 1981 A study of the disordering of quartz and chalcedony by the methods of infrared spectroscopy and electron microscopy: Moscow University Geological Bulletin, v. 36, no. 1, p. 37-42.
2641 Poese, W. 1953 Gem cutter visits Idar-Oberstein: The Mineralogist, v. 21, no. 12, p. 469, 470, 472.
2642 Pohl, J. C., Jr. 1943 The Calvert Collection: Rocks and Minerals, v. 18, no. 8, p. 240-241. Calvert, John, Lord.
2643 Poindexter, O. F., and others 1965 Rocks and Minerals of Michigan: Michigan Geological Survey Bulletin 2, (= Publication 42), 5th edition, revised, 104 p. (Problem area)
2644 Poldervaart, A. 1971 Volcanity and forms of extrusive bodies: in Green, J, and Short, N. M., (editors), Volcanic landforms and surface features. Springer-Verlaag, Berlin-Heidelberg, p. 1 - 18.
2645 Pond, A. W. 1930 Primitive methods of working stone: Logan Museum Bulletin, v. 2, no. 1. (Logan Museum does not appear in the directory of the American Association of Museums. Alonzo William Pond appears as an author of a paper dealing with weather in the Central Gobi Desert of Mongolia, an area cited as being rich in agate prehistoric artifacts made from agate and agatized wood.)
2646 Pope, D. E. undated Louisiana's Minerals: Louisiana Geological Survey, Baton Rouge, Louisiana, 2 p.
2647 Porter, A. A. 1955 A Washington State Collecting Area: Lapidary Journal, v. 9, no. 1, p. 66, 67. Silver Lake, Cedar Creek, Salmon River, Cupid River, East Canyon Creek, Randall, Washington.
2648 Porter, D. A. 1894 (1895) Notes on Some Minerals and Mineral Localities in the Northern Districts of New South Wales: Journal of the Royal Society of New South Wales xxviii, 1894 (1895), p. 39 - 44.
2649 Porter, W. P. 1979 Opaline outgrowths on Lee Formation sandstones in Wise County, Virginia. Rocks and Minerals, v. 54, no. 3, p. 97-100.
2650 Potchick, P. F. 1952 Mineral collecting at Crestmore, California: Rocks and Minerals, v. 29, no. 3, 4, p. 130-135. Opalized wood
2651 Potter, R. M. and Rossman, G. R. 1964 Mineralogy of manganese dendrites and coatings: American Mineralogist, v. 64, p. 1219-1226.
2652 Pough, F. H. 1982 Japanese manmades: Lapidary Journal, v. 35, no. 10, p. 2004-2008. Synthetic opal.
2653 Pough, F. H. 1985 Spectral gemstones. Frozen rainbows: Lapidary Journal, v. 38, no. 6, p. 19-21. Iris agate illustrated.
2654 Pough, F. M. 1973 Common opal and fire agate: Jewellers Circular Keystone. May. p. 108, 149-150, 153.
2655 Powell, R. D. 1940 Agates by the hundredweight: The Mineralogist, v. 8, no. 10, p. 410.
2656 Pozharevski, I. 1989 Proyavleniya na yuvelirni raznovidnosti na silitsievha dvuokis v rayona na Momchilgrad [Localities of silica gem varieties in Momchilgrad area]: Rudoobrazuvatelni Protsesi I Mineralni Nakhodista (Ore formation processes and mineral deposits), v. 30, p. 37-45.
2657 Pratt, E. M. 1952 Agate - gemstone of the ancients, The Mineralogist, v. 20, no. 11, p. 394, 396.
2658 Pratt, J. H. 1901 Gems and gem mining in the South: The Southland, v. 1, p. 1-5, 67-71, 118-122. (Not seen).
2659 Pratt, J. H. 1933 Gems and gem minerals of North Carolina: Ameican Mineralogist, v. 18, no. 4, p. 148-159.
2660 Pratt, M., and M. Menzel 1965 Iowa has something for everyone: Gems and Minerals, no. 334, p. 14-19. Iowa, field trip.
2661 Pratt, W. L. 1942 Siliceous oolite near Centerville, Alabama: Rocks and Minerals, v. 17, no. 10, p. 345.
2662 Prchal, M. 1968a "Dryhead"---Montana's fortification agate: Lapidary Journal, v. 22, no. 4, p. 580-583.
2663 Prchal, M. 1968b Montana's dendritic moss agate---is it all gone? Lapidary Journal, v. 22, no. 5, p. 620-631.
2664 Prchal, M. 1969 A petrified forest above the timberline: Lapidary Journal, v. 23, no.6, p. 804-807.
2665 Predmore, P. 1941 "Thunder Eggs": The Mineralogist, v. 9, no. 2, p. 54.
2666 Preston, N. E. 1988 A family outing in S.E. Texas: Lapidary Journal, v. 41, no. 12, p. 61-62. Livingston Reservoir, Petrified Wood
2667 Pretola, J. P. 1995 Optical mineralogical techniques for sourcing fine-grained quartz; a feasibility study using quartz polymorph ratios: [Abstract], Abstracts with Programs, Geological Society of America, Northeastern Section, 30th Annual Meeting, Cromwell, CT, March 10-12, 1995, v. 27, no. 1, p. 75.
2668 Purchine, M. 1967 Chalcedony pseudomorph after coral, (cover story): Rocks and Minerals, v. 42, no. 2, p. 82. Florida
2669 Purteet, B. 1967 Missouri names state rock and mineral: Earth Science, v. 20, no. 5, p. 215. Mozarkite.
2670 Purvis, R. 1971 Treasure hunting in British Columbia: McClelland and Stearite, Ltd., Toronto, 143 p.
2671 Pusl, W. 1993 Die Achatvorkommen von Sternberg bei Wackersdorf [Agate occurrences of Sternberg near Wackersdorf]: Der Aufschluss, v. 44, no. 3, p. 159-160.
2672 Pye, G. 1968 Geology and Scenery: Rainy Lake and east to Lake Superior: Ontario Department of Mines Guidebook 1, 118 p.
2673 Pye, G. 1969 Geology and Scenery: North Shore of Lake Superior: Ontario Deparetment of Mines Guidebook 2, 148 p.
2674 Pyrite Pete 1935 Moss agate found: The Mineralogist, v. 3, no. 9, p. 27. Sunflower Flat, Quartz Butte, OR