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Optic Character


Clarity


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30 Gemstones Found
Gemstones
Dispersion
Specific Gravity
Mohs Hardness
Refractive Index
Optic Character
Talisman
Anorthoclase
Anorthoclase
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Not Available
2.56-2.62
6-6.5
1.518-1.534
Not Available
Not Available
Augelite
Augelite
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Not Available
2.70-2.75
4.5-5
1.570-1.591
Not Available
Not Available
Bertrandite
Bertrandite
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Not Available
2.59-2.60
6-7
1.583-1.614
Not Available
Not Available
Beryllonite
Beryllonite
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0.01
2.79-2.87
5.5-6
1.552-1.562
Not Available
Not Available
Colemanite
Colemanite
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Not Available
2.40-2.42
4.5
1.584-1.615
Not Available
Not Available
Creedite
Creedite
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Not Available
2.70
4.5
1.461-1.485
Not Available
Not Available
Girasol
Girasol
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None
1.98-2.50
5.5-6.5
1.37-1.52
Not Available
Not Available
Gypsum
Gypsum
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Not Available
2.20-2.40
2
1.521-1.531
Not Available
Not Available
Hambergite
Hambergite
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0.02
2.33-2.37
7.5
1.543-1.631
Not Available
Not Available
Herderite
Herderite
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Not Available
2.90-3.02
5-5.5
1.587-1.642
Biaxial/+
Not Available
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