offers links to websites related to biochemistry, reliability engineering, chemist, morality, medical physics, mechanical engineering, earth sciences, materials, astrophysics, nuclear, software, molecular and much more.
Geology and Geophysics
American Gem Society
Asian Institute of Gemology Sciences
offers programs in gemology.
Gemmological Association and Gem Testing Laboratory of Great Britain
Gemological Institute of America
GIA's mission is to ensure the public trust by educating and serving the gem and jewelry industry worldwide.
International Colored Gemstone Association
information resource with shopping tips, the latest market news, and Gem-o-Rama.
International Gem Society
dedicated to bringing quality information and educational services to everyone interested in gemstones.
International Gemological Institute
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