how to facet
gemstone main cabochon creation
min data

Mineral: sillamnite
Gem: sillimanite
Size: 8mm x 10mm
Carat: 2.16 ct
Cut: oval
Origin: unknown
General Info: The the stone is named after the Yale University American chemist, and geologist, Benjamin Silliman.
Additional Information
This is a nice example of a faceted stone showing two colors in the flash. It is mainly clear to yellow with a light green flash. It is a typical native cut stone with a fish-eye in the bottom.