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To: BlueCrab who wrote (31377)	7/9/1999 7:06:00 PM
From: Jacques Chitte	Respond to of 71178

Azurite is a basic hydrous copper carbonate. It air-decomposes to malachite, which is more copper and less carbonate. Lazurite has soduim, aluminum, silicate ... it oughtta be white. I once saw an explanation for lazurite's color, and it was unconventional. **** me if I can remember it now.

To: BlueCrab who wrote (31377)	7/9/1999 7:06:00 PM
From: Ilaine	Respond to of 71178

No copper, that would be easy. I need to find the formula. Back in a semi-flash.

To: BlueCrab who wrote (31377)	7/9/1999 7:09:00 PM
From: Ilaine	Respond to of 71178

Chemistry: (Na, Ca)8Al6Si6O24(S, SO4) , Sodium Calcium Aluminum Silicate Sulfur Sulfate.