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Natural heritage
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Adrian Smith Mineral Collection
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Minerals, gems and meteorites
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10-75 Sulphides
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Crystaline
12. Orpiment. Crystaline
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Dana number
2.11.1.1
Chemical formula
As
2
S
3
Crystal class
Monoclinic
Mohs hardness
1.5-2
Specific gravity
3.4-3.5
Collected in
Unknown, Unknown
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