Some are composed of organic materials, some are fossilized organic structures.
Author: Hobart M. King, PhD, GIA Graduate Gemologist
What are Organic Gems?
Although most gemstones are mineral materials, a number of organic materials are also considered to be gemstones. The most common of these are pearl, bone, amber, coral, jet, and ivory. These are materials, produced by organisms, that have been cut into gems and other ornamental objects.
There are also organic materials that have been mineralized (replaced and infilled by chalcedony, opal, calcite, aragonite, pyrite, or other mineral material). Although the material itself is not organic, it does preserve an organic structure. Examples include petrified wood, fossil coral, dinosaur bone, and other fossilized organisms or parts of organisms.
Table of Contents
Fossilized Coral and Bryozoans
Mary Ellen Jasper
Mother of Pearl
|Mined in America
|Ruby and Sapphire
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