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Calaverite, AuTe2, Cripple Creek, Teller County, Colorado, USA. Quartz matrix with abundant calaverite crystals. © Lou Perloff /

Quartz matrix with abundant calaverite crystals.

Golden Sphalerite crystals on a bed of micro Quartz crystals with some Galena crystals from Bulgaria, 2"

Sphalerite and Gelena crystals over Golden Sphalerite crystals on a bed of micro Quartz crystals with some Galena crystals from Bulgaria,

Natural gem quality Cripple Creek Co. turquoise from the Burtis Blue Mine. Right out of the tumbler :)

Natural gem quality Cripple Creek Co. turquoise from the Burtis Blue Mine. Right out of the tumbler :) by Growers Garden

Colorado Prospector - Gem and mineral prospecting and mining forums > Taxidermy Class

Colorado Prospector - Gem and mineral prospecting and mining forums > Taxidermy Class

Arsenopyrite Арсенопирит  минерал из класса сульфидов состава FeAsS. Синонимы: мышьяковый колчедан, миспикель, тальгеймит Арсенопирит — основное сырьё для получения мышьяка и его соединений

Arsenopyrite Арсенопирит минерал из класса сульфидов состава FeAsS. Синонимы: мышьяковый колчедан, миспикель, тальгеймит Арсенопирит — основное сырьё для получения мышьяка и его соединений

Twelve Apostles by Olivia Cassano

Twelve Apostles by Olivia Cassano

Gold, Pyrite, & Quartz Cripple Creek, Teller Co., Colorado  1.25 x 1 x .6 inches

Gold, Pyrite, & Quartz Cripple Creek, Teller Co.

0,9 mm wide platelet of Tainiolite on Pectolite (mica group) found by Lazlo Horvath, photo : W. Stoll

mm wide platelet of Tainiolite on Pectolite (mica group) found by Lazlo Horvath, photo : W.

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Mineral crystals grow under a variety of conditions. Slow cooling of magma (melted rock) deep within the Earth generally leads to a rock such as granite with visible crystals of feldspar, quartz, mica, amphibole and other minerals.

Paleozoic Mesozoic Cenozoic

Rock Layers: Timeline of Life on EarthEvolution is a complicated subject. While everybody understands that black bears are related to grizzly bears and we can even figure they are related to extinct bears, lots of people wonder how scientists can be so su

Dyscrasite - Mineral Gallery - Smithsonian Institution

A specimen of dyscrasite from Czech Republic. Part of the National Mineral Collection.

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