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ID: K11208
Pendant with opal, variety precious (center), surrounded by opals, topaz, chrysoberyls, demantoid garnets, sapphires and pearls, Russia
ID: K11209
Decorative clock face, Quartz, variety onyx, 8 cm in diameter, carved in Idar-Oberstein, Germany in 1867
ID: K11210
Opal, variety Pinfire, 181.20 carats, Lightning Ridge, Australia
ID: K11211
Opal, variety precious, 11.23 carats, Barcoo River, Australia
ID: K11217
Headdress pendant, pearls, sapphires, rubellites and jadeite, Manchu, China
ID: K11219
Water buffalo, carved jade, nephrite, H 11.5 cm, Ming Dynasty, China
ID: K11220
Duck with lotus plants, carved jade, nephrite, 21 x 16 cm, China
ID: K11222
Junk, carving from lazurite, China
ID: K11224
<em>Schettler Emerald</em> (beryl), 87 carats, engraved on both sides, lapidary art, 17th century, India
ID: K11225
Spessartine (garnet) deep red oval-cut stone, 28.85 carats (left) ; violet-red pear-shaped stone (right), 24.5 carats, Umba River region, Tanzania
ID: K11227
Harlequin Prince opal, 215.85 carats, Lightning Ridge, Australia
ID: K11228
Corundum, variety sapphire, violet stone, 66.85 carats, Sri Lanka
ID: K11229
Corundum, variety sapphire, yellow faceted stone, 100 carats, Sri Lanka
ID: K11231
Padparadscha, corundum, variety sapphire, orange faceted stone, 100 carats, Sri Lanka
ID: K11232
Topaz, natural yellow-orange crystal, 5 cm long (left), 60 carats, brilliant-cut (right), Ouro Preto, Minas Gerais, Brazil
ID: K11234
Topaz, natural blue crystal, 6 cm across (left); oval-cut stone, 99 carats (right), Ural Mountains
ID: K11238
Topaz, oval-cut faceted stone, 70 carats, Russia
ID: K11239
Sapphires (Corundum), about 1 carat each, Sri Lanka
ID: K11240
Elbaite, gem-quality faceted stones: left, yellow-green, 15.75 carats; right, blue-green, 10.25 carats, Brazil
ID: K11241
Elbaite, gem-quality crystals: left, brilliant cut, 34.03 carats; right, modified cushion cut, 34.25 carats
ID: K11622
Sphalerite, loose honey-brown gem-quality crystal, 2.5 cm across, United States
ID: K11637
Kyanite, bluish-brown bladed crystals in gray paragonite schist, 9.0 x 7.5 cm, Pizzo Forno Mountain, Switzerland
ID: K11639
Spodumene, variety Kunzite, pink-violet emerald-cut stone, 110 carats, Minas Gerais, Brazil
ID: K11653
Olivine, variety Peridot, bottle green mixed-cut stone, 164 carats, Myanmar (Burma)
ID: K11656
Labradorite (feldspar), bi-colored red and green faceted stones averaging 1.5 carats, Clear Lake, Oregon
ID: K11674
Olivine (variety Peridot), yellowish-green prismatic crystal, 2 cm across, Egypt
ID: K11694
Corundum (variety Sapphire), blue faceted stone, 40 carats
ID: K12665
Vanadinite, brilliant orange-red hexagonal prisms, up to 1 cm across, Morocco
ID: K13060
Beryl, variety Heliodor, gem-quality crystal group, H 10 cm, Minas Gerais, Brazil
ID: K13066
Spessartine, garnet, perfect reddish-brown crystal (5 cm across) on matrix of quartz and muscovite
ID: K13780
Quartz, variety Rock crystal, crystal group, L 10 cm, Hot Springs, Arkansas
ID: K13781
Lazurite (lapis lazuli), polished boulder of royal blue color, 1.2 kg, Afghanistan
ID: K13782
Translucent slice of Jade (Nephrite), 18 cm wide, Onot River, Russia
ID: K13783
Fluorite, green color, natural octahedral cleavage fragment, 20 cm across, Westmoreland, New Hampshire
ID: K13785
Corundum, variety Sapphire, blue gravel, Yogo Gulch, Montana, United States
ID: K13787
Beryl, variety Aquamarine, four faceted stones set with melee diamonds in platinum; carat weights: clip, 41.25; ring, 31.64; earrings, 16.89 and 16.32
ID: K13788
Beryl, variety aquamarine, Brazil
ID: K13789
Beryl, variety Morganite, gem-quality crystal in matrix, 6 cm across, Tourmaline Queen Mine, California
ID: K13791
Elbaite, tourmaline (variety watermelon), four single gem-quality crystals, largest L 10 cm, Himalaya Mine, California
ID: K13792
Elbaite (variety Rubellite), gem-quality crystal on matrix, 10 cm, Stewart Mine, California
ID: K13794
Zircon, natural brown crystal, L 7.5 cm, Delaney, Ontario
ID: K13795
Spessartine, garnet crystal (2 cm across) on smoky quartz, Little Three Mine, Ramona, California
ID: K13796
Grossular (garnet), deep emerald-green oval-cut stone, 8.14 carats, Tsavo National Park, Kenya
ID: K13817
Armstrong Diamond, emerald-cut stone set in ring with two tapered baguettes, 14.11 carats
ID: K13825
<em>The Microphone</em>, Elbaite tourmaline, variety Rubellite, L 25 cm, Himalaya Mine, California
ID: K13826
Elbaite tourmaline, variety Rubellite, transparent pink crystal, 5.5 cm long on quartz crystal matrix
ID: K13833
Gold, aborescent wires on iron-stained quartz, field of view is 1 cm, Bement Collection, American Museum of Natural History
ID: K13834
Gold, electrum flat crystals with trigons, octahedral form 111, field of view 3 cm wide, Rosia-Montana, Romania
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: 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: K11202
Kashmir blue star sapphire
ID: K11236
Topaz, 99 carats, from the Ural Mountains, Russia
ID: K13059
Azurite, Tsumeb, Namibia
ID: K13784
Diamond, octahedral crystal, 25 carats
ID: K13790
Beryl, variety Morganite, American Museum of Natural History
ID: ptc-3408
Jet frog effigy inlaid with turquoise, 8.2 centimeters (length), from Pueblo Bonito, Chaco Canyon, New Mexico
ID: ptc-1201
Tiki, jade, New Zealand
ID: ptc-5078
Earspools, cut and polished shell with design of human figures, Chimu style, Peru
ID: ptc-712
Emerald ring and crystal, Patricia Emerald, Colombia
ID: ptc-711
ID: ptc-7302
Seated Buddha, jade or malachite
ID: ptc-1046
Jet frog with turquoise, Pueblo Bonito, New Mexico
ID: ptc-960
Tourmaline crystal showing striations, Brazil
ID: ptc-1204
Ha-Tiki, jade, New Zealand
ID: ptc-1203
ID: ptc-1202
ID: ptc-956
Tourmaline (pink) and quartz (colorless), Pala, California
ID: ptc-958
Tourmaline, pink crystals, Pala, California
ID: ptc-3186
Cylinder, turquoise and shell beads, inlaid with waxed layer on surface, Pueblo Bonito, New Mexico
ID: ptc-2807
Opal, replacing clam shell, 69 carats, Australia
ID: ptc-489
Spodumene, variety Hiddenite
ID: ptc-483
Three tourmaline rings
ID: ptc-4779
Aquamarine brooch, earrings, and ring in platinum with diamonds
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