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Geology

"Stones!" *cough* I mean, the beauty of geology... Gems, Minerals, Fossils. Also cuts & colours.
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Natural History Museum

Plate from Françoise Louis Swebach Desfontaines' 'Histoire naturelle' (1789). Natural History Museum, London

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Opal Colourations

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Malachite - $200 LEtoile du Congo Mine, Lubumbashi, Katanga Copper Crescent, Democratic Republic of the Congo

Fine Collector Mineral Specimens - Andy Seibel

andyseibel.com

Malachite Stalactite Slice Handcrafted Sterling Silver Pendant

Malachite Stalactite Slice Handcrafted Sterling Silver Pendant

crystalarium.com

Azurite and Malachite Natural Crystal Sphere - Argentina

Azurite and Malachite Natural Crystal Sphere - Argentina

crystalarium.com

Malachite with (originally: http://www.crystalarium.com/single-page.php?pid=7733296&cat=minerals-s18, now 404)

Malachite with Chrysocolla - partially polished Stalactite / Congo

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Smithsonian Institute Global Volcanism Program

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V některých částech dolu se stále ještě těží. Foto, ilustrace: Profimedia

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Quartz with blue fluorite inclusions.

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Ethiopian kryptonite (opal) | via Jeff Schultz on Flickr

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Fossilised teeth | via Jeff Schultz on Flickr

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Gallium: A metal with a melting point of a little over 27 degrees centigrade. Meaning it melts from solid state to liquid state in your hand

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Fire Opal in matrix, Mexico | via Jeff Schultz on Flickr

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Helpful gem chart

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Amethyst Crystal Ball

2.4" Amethyst Geode Sphere, Crystal Ball

rikoo.com

Boulder Opal

Blog - Laura Preshong Jewelry

ganoksin.com

Veszelyite. One of the minerals called phosphates. All phosphates have the phosphate group, PO4, in their chemical composition. Many phosphates form from the chemical alteration of other minerals in the presence of oxygen. Group: Phosphates. Image Number: 97-35129. Catalog Number: 148368. M. Stuart

The Dynamic Earth @ National Museum of Natural History

mnh.si.edu

Smithsonite. The mineral was named after James Smithson, the British chemist and mineralogist who first recognized it as a distinct mineral, different from calamine(hemimorphite). It is mined for zinc. James Smithson (1754-1829) was the founder of the Smithsonian Institution. Group: Carbonates, Image Number: MSA 62

The Dynamic Earth @ National Museum of Natural History

mnh.si.edu

Liddicoatite. Slice from a single crystal of liddicoatite. The colour-zoning reveal the crystal's history, just as the rings in a tree records its past. Crystals may start and stop growing many times. In most cases, there is no way of knowing how long each phase lasted. This particular crystal changed color as it grew. The pink portion of the liddicoatite formed when the solution feeding it was manganese rich. The green part grew when the solution became iron rich.

The Dynamic Earth @ National Museum of Natural History

mnh.si.edu

Rare Nipomo marcasite in agate, from California.

NIPOMO MARCASITE designer cab Silverhawk's designer gemstones.

samsilverhawk.com

Deschutes jasper

DESCHUTES JASPER designer cab Silverhawk's designer gemstones.

samsilverhawk.com

Ethiopian Welo opal beads, about 100 carats. The largest beads are about 10 mm diameter. | via James Picht on Flickr

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Lapis Lazuli & Pyrite | via Maryanne Fender on Flickr

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Azurite & Malachite Cabochon | via Maryanne Fender on Flickr

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Malachite Round Cabochon | via Maryanne Fender on Flickr

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