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FLUORITE

Click on the image to see a larger version copyright statement	Description: Two generations of fluorite, 4[CaF2]: glassy blue and purple cubes on a base of yellow fluorite cubes with naturally-etched , cone-like, hollows in them.
	Locality: Minerva #1 Mine, Cave in Rock District, Hardin Co., Illinois, U.S.A.
	Photo donor: Image is by courtesy of Stuart Wilensky www.wilenskyminerals.com