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.
From Wikipedia, the free encyclopedia. Jump to: navigation, search. This is a list of gemstones, organized by species, color, size. Contents. [hide]. 1 Minerals.
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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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).
An interactive reference guide to rocks, minerals, and gemstones.
The Gemstone Information Encyclopedia. For most jewelry customers, the standard gems including diamond, ruby, emerald, sapphire, pearl, opal, turquoise, ...
For the first time ever, Joel Arem is making available, on-line, his widely-used Color Encyclopedia of Gemstones. The first edition of the Encyclopedia took 3 ...