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3D3DRealgar-Orpiment.
A very beautiful mixture of realgar and orpiment crystals (two different crystal forms of arsenic suflide).
Source: eBay seller kevinsantiquerocks
Contributor: Theodore Gray
Acquired: 11 March, 2009
Text Updated: 12 March, 2009
Price: $25
Size: 2"
Composition: As4S4
Arsenic