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ID: K13863
Manganite, group of lustrous blocky, black crystals, 15 x 10 cm, Harz, Germany
ID: K13864
Microcline, tan-colored Carlsbad twin, 8 x 4 x 3.5 cm, Himalaya Mine, California
ID: K13865
Quartz, large violet Amethyst crystals, 7 pounds, Upper Providence, Pennsylvania, found November, 1887
ID: K13866
Rosalite, pink crystals, 1 cm across on matrix, Bou Azzer Mines, Morocco
ID: K13867
Schorl, stubby black tourmaline crystals, up to 4 cm high, on matrix of tan colored albite, Little Three Mine, California
ID: K13869
Stibnite prismatic crystals, 26.2 x 6.2 cm, Ichinokawa mine, Japan
ID: K13870
Topaz, 3 x 3 cm, Little Three Mine, California
ID: K13919
Spinel, deep ruby-red octahedral crystals in marble, up to 5mm across, Mogok, Myanmar (Burma)
ID: K13920
Cameo portrait of child, sanadine, variety moonstone
ID: K13921
Quartz, variety Trystine, 45.71 carats, Puerto Suarez, Bolivia
ID: K13922
Gem-quality turquoise, 45 pound boulder, Bodalla, Australia
ID: K13923
Turquoise, polished cabochon, 160 carats, Kingman, Arizona
ID: K13924
Fluorite, green fancy-cut stone, 101.35 carat, Westmoreland, New Hampshire
ID: K13925
Notched Boulder, 45.5 lbs, Jadeite, Myanmar
ID: K14462
Quartz, variety Amethyst, oval-cut stone, 158 carats, Ural Mountains, Russia
ID: K14463
Fluorapatite, yellow-green oval-cut, 28.65 carats, Mexico
ID: K14464
Elbaite, variety Rubellite, pink faceted stone, 40.12 carats, Madagascar
ID: K14465
Chrysoberyl, yellow-green twinned crystal group (sixling) 5 cm across, Brazil
ID: K14466
Zoisite, variety Tanzanite, blue-violet prismatic crystal, H 3 cm
ID: K14467
Oval-cut spinel, cobalt blue, 27 carats, Sri Lanka
ID: K14468
Zircon, intense blue, brilliant-cut stone, 208.65 carats, Kandy area, Sri Lanka
ID: K14469
Beryl, variety Morganite, heart-shaped, faceted stone, 58.79 carats, Madagascar
ID: K14470
Spinel, violet, brilliant-cut stone, 46.48 carats, Sri Lanka
ID: K14471
Beryl, variety Heliodor, faceted stone, 5.34 carats, Brazil
ID: K14472
Zircon, violet-brown brilliant-cut stone, 18.9 carats, (Ceylon) Sri Lanka
ID: K14497
Canyon Diablo,1.2 km wide meteor crater, aerial view, Arizona
ID: K14800
Corundum crystal, variety ruby, in marble matrix, L 2 cm, (Burma) Myanmar
ID: K14817
Cat's eye, Chrysoberyl gemstone
ID: K14818
Andradite, variety Demantoid garnet, emerald-green brilliant cut, 4.50 carats, Poldenwaja, Siberia
ID: K7027
Decorative gold weights, Ashanti (Asante), Africa
ID: K11202
Kashmir blue star sapphire
ID: K11206
Seated God of Happiness, Chinese, carved in malachite
ID: K11236
Topaz, 99 carats, from the Ural Mountains, Russia
ID: K11619
Fluorite, yellow, Cornwall, England
ID: K11628
Fluorapatite, Cerro del Mercado, Durango, Mexico
ID: K11631
Calcite with barite, Fritzington, England
ID: K11634
Labradorite, Oregon
ID: K11931
Scorodite, Zacatecas, Mexico
ID: K11932
Paramelaconite, Bisbee, Arizona
ID: K13059
Azurite, Tsumeb, Namibia
ID: K13784
Diamond, octahedral crystal, 25 carats
ID: K13790
Beryl, variety Morganite, American Museum of Natural History
ID: ptc-712
Emerald ring and crystal, Patricia Emerald, Colombia
ID: ptc-711
ID: ptc-723
Vessel, jade
ID: ptc-727
Sculpture, carved rose quartz
ID: ptc-959
Tourmaline, green crystals on quartz, Brazil
ID: ptc-960
Tourmaline crystal showing striations, Brazil
ID: ptc-2063
Diana at the Hunt, helmet shell cameo, carved calcite, probably 19th century, Torre del Greco, Italy
ID: ptc-955
Tourmaline crystal, cross section, Madagascar
ID: ptc-957
ID: ptc-956
Tourmaline (pink) and quartz (colorless), Pala, California
ID: ptc-958
Tourmaline, pink crystals, Pala, California
ID: ptc-2083
"The Newmont Gold," a mass of crystallized gold (leaf), 1 kilogram, 18.8 x 13.7 cm, discovered in mud-filled pocket, 1951, Gift of Newmont Mining Corporation, Empire Star Mines
ID: ptc-1164
Halite crystal model
ID: ptc-2807
Opal, replacing clam shell, 69 carats, Australia
ID: ptc-2808
Figure with bird, carved relief
ID: 328171
Quartz lined thunder eggs or geodes, Rhyolite nodules
ID: 100213323_37
Amethyst, Guerera, Mexico, Harry Frank Guggenheim Hall of Minerals, postcard
ID: 100213323_38
Specimen of crystalized native gold, about 7 inches across, from the Empire Star Mine of Grass Valley, California, exhibited in the Guggenheim Hall of Minerals, postcard
ID: 100213323_39
Fine leaf native gold specimen on milky quartz from California, about 3 inches high, Guggenheim Hall of Minerals, postcard
ID: 260769
Selenite window, Acoma, New Mexico
ID: ptc-489
Spodumene, variety Hiddenite
ID: ptc-484
Antimony stibnite, ore
ID: ptc-486
Native copper, Michigan
ID: ptc-479
Quartz plate in polarized light
ID: ptc-480
ID: ptc-5984
"Peculiar Diamonds" of India and Brazil, from A Treatise on Diamonds and Precious Stones by John Mawe, 1823
ID: ptc-5985
Illustration showing diamond cutting and polishing, from The Nature of Diamonds by John Mawe, 1823
ID: ptc-5991
Illustration of famous diamonds from Tavernier, 1681
ID: 2A7845
Carving materials, Morgan Gem Hall, 1965