A gemstone is a piece of mineral crystal which, in cut and polished form, is used to make ... From Wikipedia, the free encyclopedia. Jump to: navigation, search.
Gem Encyclopedia is a virtual journey through the science and lore of Gemstones from across the globe. Each Gem page features Gemological Information, ...
Agate is distinguished by having multiple colors. While not usually as rich as our crystalline gems, the colors can be quite vivid. Agates are sometimes opaque, ...
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Color Encyclopedia of Gemstones [Joel E. Arem] on Amazon.com. *FREE* shipping on qualifying offers. Provides information on all known gemstone species ...
Color Encyclopedia of Gemstones [Joel E. Arem] on Amazon.com. *FREE* shipping on qualifying offers. This book should be of interest to gemologists; gem ...
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A selection of gemstone pebbles made by tumbling rough rock with abrasive grit, in a rotating drum. The biggest pebble here is 40 millimeters long (1.6 inches).