Kasoff and others in the company designed the jewelry but had it produced by other companies. The Florenza cameo pin above is hand carved. This glassy, lustrous mineral is found in lava flows, and obsidian stones can be massive. Most obsidian is 70 percent silica. Obsidian has a hardness of 5 and a specific gravity of 2.35.
Crystals are transparent to translucent .
The chemical formula for fluorite is CaF 2 . Fluorite is found all around the world. Fobs were worn hanging from a pocket. Fob is also the word for the small pocket in trousers that held a pocket watch. The word fob is also commonly used for the fob charm itself.