Lapis Lazuli Slabs
Lapis has been prized as a gemstone since ancient Egypt. It
cuts easily and polishes with tin or chrome oxide, with a tiny bit
of aluminum oxide type A mixed in. In order to obtain a higher polish,
it can be given a final polish with Zam
or waxed. Lapis usually has pyrite in it.
Example of a Lapis Lazuli Cabochon.