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ID: K14501
Sun's Eye Arch, Monument Valley, Arizona
ID: K14500
Mitten Buttes, Monument Valley, Arizona
ID: K14499
Montezuma's Castle National Monument, Arizona
ID: K14498
ID: K14497
Canyon Diablo,1.2 km wide meteor crater, aerial view, Arizona
ID: K14496
Grand Canyon, Arizona
ID: K14495
ID: K14494
ID: K14493
ID: K14492
ID: K14491
ID: K14490
Battleship rock formation, Grand Canyon National Park, Arizona
ID: K14489
Bright Angel Trail, Zig Zag, Grand Canyon National Park, Arizona
ID: K14488
ID: K14487
ID: K14486
ID: K14485
ID: K14484
ID: K14483
ID: K14482
Grand Canyon heading towards Painted Desert, Arizona
ID: K14481
ID: K14480
Grand Canyon, late in the day, Arizona
ID: K14479
ID: K14478
Rocks, vegetation, trees, Grand Canyon, Arizona
ID: K14477
North Rim, Grand Canyon, Arizona
ID: K14476
Angel's Window, North Rim, Grand Canyon, Arizona
ID: K14475
Snow-covered mountain top, Denali National Park, Alaska
ID: K14474
Snow-covered Mount McKinley, Denali National Park, Alaska
ID: K14473
Snow-covered mountains, Denali National Park and Reserve, Alaska
ID: K14472
Zircon, violet-brown brilliant-cut stone, 18.9 carats, (Ceylon) Sri Lanka
ID: K14471
Beryl, variety Heliodor, faceted stone, 5.34 carats, Brazil
ID: K14470
Spinel, violet, brilliant-cut stone, 46.48 carats, Sri Lanka
ID: K14469
Beryl, variety Morganite, heart-shaped, faceted stone, 58.79 carats, Madagascar
ID: K14468
Zircon, intense blue, brilliant-cut stone, 208.65 carats, Kandy area, Sri Lanka
ID: K14467
Oval-cut spinel, cobalt blue, 27 carats, Sri Lanka
ID: K14466
Zoisite, variety Tanzanite, blue-violet prismatic crystal, H 3 cm
ID: K14465
Chrysoberyl, yellow-green twinned crystal group (sixling) 5 cm across, Brazil
ID: K14464
Elbaite, variety Rubellite, pink faceted stone, 40.12 carats, Madagascar
ID: K14463
Fluorapatite, yellow-green oval-cut, 28.65 carats, Mexico
ID: K14462
Quartz, variety Amethyst, oval-cut stone, 158 carats, Ural Mountains, Russia
ID: K14238
Eruption of Mount Vesuvius, seen from Naples, 1776, from Hamilton's Campi phlegraei
ID: K14221
Interior view of Mount Vesuvius, seen from Naples, 1776, from Hamilton's Campi Phlegraei: observations on the volcanos of the Two Sicilies
ID: K14215
Minerals, original watercolor by Guil. De Favanne Filius Pinx from Recueil de dess[ins] enluminé[s], 1830
ID: K13925
Notched Boulder, 45.5 lbs, Jadeite, Myanmar
ID: K13924
Fluorite, green fancy-cut stone, 101.35 carat, Westmoreland, New Hampshire
ID: K13923
Turquoise, polished cabochon, 160 carats, Kingman, Arizona
ID: K13922
Gem-quality turquoise, 45 pound boulder, Bodalla, Australia
ID: K13921
Quartz, variety Trystine, 45.71 carats, Puerto Suarez, Bolivia
ID: K13920
Cameo portrait of child, sanadine, variety moonstone
ID: K13919
Spinel, deep ruby-red octahedral crystals in marble, up to 5mm across, Mogok, Myanmar (Burma)
ID: K13870
Topaz, 3 x 3 cm, Little Three Mine, California
ID: K13869
Stibnite prismatic crystals, 26.2 x 6.2 cm, Ichinokawa mine, Japan
ID: K13867
Schorl, stubby black tourmaline crystals, up to 4 cm high, on matrix of tan colored albite, Little Three Mine, California
ID: K13866
Rosalite, pink crystals, 1 cm across on matrix, Bou Azzer Mines, Morocco
ID: K13865
Quartz, large violet Amethyst crystals, 7 pounds, Upper Providence, Pennsylvania, found November, 1887
ID: K13864
Microcline, tan-colored Carlsbad twin, 8 x 4 x 3.5 cm, Himalaya Mine, California
ID: K13863
Manganite, group of lustrous blocky, black crystals, 15 x 10 cm, Harz, Germany
ID: K13862
Lepidolite, pseudo-hexagonal crystals of lavender color, average size 2 cm, on 18 x 12 x 11.2 cm matrix, Little Three Mine, California
ID: K13861
Hydroxyl-herderite, tan colored single crystal, 10 x 5 cm, Brazil
ID: K13847
Paricutin volcano in distance, Michoacan, 1950
ID: K13846
Paricutin volcano with diminished dust cloud, Michoacan, 1945
ID: K13845
Volcanic eruption, Paricutin
ID: K13844
Man tasting salts lining vents in volcano, Paricutin, Michoacan
ID: K13843
Frozen lava lake, Paricutin, Mexico
ID: K13842
Taqui vent and lava lake, aerial view, Paricutin volcano
ID: K13841
Paricutin volcano erupting at twilight, Mexico
ID: K13840
Mules of pack train coming out; trees and century plants deep in ash, person at left, Paricutin
ID: K13839
Volcanic bomb thrown from Paricutin, hammer at right
ID: K13838
Chart: Paricutin's rate of growth and important events, February 1943-1944
ID: K13837
Dust column rising 30,000 feet above Paricutin volcano
ID: K13836
Men plowing field with oxen, Paricutin
ID: K13835
"Paricuti" spelled in ash across field, Paricutin
ID: K13834
Gold, electrum flat crystals with trigons, octahedral form 111, field of view 3 cm wide, Rosia-Montana, Romania
ID: K13833
Gold, aborescent wires on iron-stained quartz, field of view is 1 cm, Bement Collection, American Museum of Natural History
ID: K13832
Thick plate of flattened gold octahedral crystals, 9.5 x 6.0 cm
ID: K13831
Specimen with gold micro octahedra on drusy quartz matrix, L 12 cm
ID: K13830
Crystallized gold showing lattice-like network of intergrown crystals, 4.5 x 3.0 cm, United States
ID: K13829
Erythrite cobalt bloom radiating as needle-like crystals, on matrix, 6 cm across, Schneeberg, Germany
ID: K13828
Elbaite tourmaline, variety Verdelite, L 6.3 cm, Himalaya Mine, California
ID: K13827
Elbaite tourmaline, variety Bicolor, 9.6 x 3.8 x 1.8 cm, Himalaya Mine, California
ID: K13826
Elbaite tourmaline, variety Rubellite, transparent pink crystal, 5.5 cm long on quartz crystal matrix
ID: K13825
<em>The Microphone</em>, Elbaite tourmaline, variety Rubellite, L 25 cm, Himalaya Mine, California
ID: K13824
Copper crystals, average size 2 cm across, 25 x 20 cm, Lake Superior, Michigan
ID: K13823
Chondrodite, rounded brown crystals up to 1.5 cm across on matrix, Tilly Foster Mine, New York
ID: K13822
Black, striated chalcocite crystals on matrix, up to 2 cm long, Bristol, Connecticut
ID: K13821
Beryl, variety Morganite, pink flattened complex single crystal, 6.5 x 5.0 x 2.5 cm, Afghanistan
ID: K13820
Beryl, variety Morganite, 2.5 cm across, attached to a bicolored elbaite crystal, 10.7 x 7.5 x 5.5 cm, Tourmaline Queen Mine, California
ID: K13819
Barite, golden brown scepter-like crystal, L 10 cm, growing on drusy barite matrix, Frizington, England
ID: K13818
Azurite, crystal group on matrix, average 3 cm across, Bisbee, Arizona
ID: K13797
Polished slab, Labradorite, 7.5 cm across, displaying labradorescence (rainbow-like play of colors), Canada
ID: K13796
Grossular (garnet), deep emerald-green oval-cut stone, 8.14 carats, Tsavo National Park, Kenya
ID: K13795
Spessartine, garnet crystal (2 cm across) on smoky quartz, Little Three Mine, Ramona, California
ID: K13794
Zircon, natural brown crystal, L 7.5 cm, Delaney, Ontario
ID: K13793
People viewing topaz, transparent yellow crystal, Fazenda do Funil, Brazil, Harry Frank Guggenheim Hall of Minerals, circa 1980
ID: K13792
Elbaite (variety Rubellite), gem-quality crystal on matrix, 10 cm, Stewart Mine, California
ID: K13791
Elbaite, tourmaline (variety watermelon), four single gem-quality crystals, largest L 10 cm, Himalaya Mine, California
ID: K13790
Beryl, variety Morganite, American Museum of Natural History
ID: K13789
Beryl, variety Morganite, gem-quality crystal in matrix, 6 cm across, Tourmaline Queen Mine, California
ID: K13788
Beryl, variety aquamarine, Brazil
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