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3D3DLovely large translucent crystal.
This is a large crystal of sulfur from El Desierto Mine, Salar de Uyun, Bolivia. It's claimed to be quite unusually large, though I wouldn't know how big these things normally are: It's certainly much bigger than any sulfur crystal I've ever seen, and more transparent. I made two sets of photographs and rotations, one with light from the front and back so you can see both translucency, and this one with light only from the back (click the picture to go to a page where you can see the rotation):

Source: eBay seller belkisminerals
Contributor: Theodore Gray
Acquired: 14 March, 2007
Text Updated: 14 March, 2007
Price: $22
Size: 1.75"
Purity: >95%