The chemical formula for fluorite is CaF 2 . Fluorite is found all around the world. Fobs were worn hanging from a pocket. Stones are rarely foiled any more. It is used to attach the two ends of a necklace or bracelet .
Marcasite stones come from pyrite.
Fossils can be used to make beautiful jewelry. A final layer of clear enamel often covers the piece. It was frequently carved. These pearls are frequently shaped like crisped rice cereal, and are less valuable than oyster pearls. Biwa pearls are very good quality freshwater pearls.