Today mines in northeast Afghanistan and Pakistan are still the major source of lapis lazuli. The major mineral in lapis, is lazurite, minor minerals are calcite, pyrite and a few other very minor minerals. the basic formula for lapis is (Na,Ca)8Al6Si6O24(S,SO)4.

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Faceted 20x9mm Rectangle Lapis & Gold Earrings

This is a good grade of lapis with some faceting instead of just a regular cabochon.