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APATITE on quartz

Click on the image to see a larger version copyright statement	Description: A cluster of large, bluish-purple, barrel-shaped, apatite crystals, 2[Ca5(PO4)3F], formed at the junction of two quartz crystals.
	Locality: Panasqueira, Portugal
	Photo donor: Image is by courtesy of Stuart Wilensky www.wilenskyminerals.com