  Native Selenium.
Description from the source:
Native Selenium ( Se trig.), Anna Mine, Alsdorf, Germany. Distinct crystals on matrix! 3,5x2,5x1 cm; 22 g.
Source: Simone Citon
Contributor: John Gray
Acquired: 10 January, 2009
Text Updated: 10 January, 2009
Price: Trade
Size: 1.4"
Composition: Se
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