Special Order Fine Jewelry by Mark Somers
Graduate Gemologist
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Gemological Institute of America
Gemological Institute of America
Geology Page
Geology Page: List of Minerals, Geologic Time Scale, Geology Tools, and More
SilverSupplies.com
Starr Gems. Serving Jewelers, Silversmiths, Goldsmiths, Beaders, Lapidaries and Faceters Since 1967.
POV-RAY The persistence of vision raytracer
Ray tracing program used for creating 3d models.