Calcium Very large fluorite
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3D3DVery large fluorite. (External Sample)
This is a huge, flat slab of fluorite crystals from the (now closed) mines in Southern Illinois. It is illuminated from the opposite side to show the translucence of the crystals.
Location: John Gray's Collection
Photographed: 3 December, 2004
Size: 24"
Composition: CaF2
Calcium