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Optic Character


Clarity


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Violet Gemstones

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Gemstones
Dispersion
Refractive Index
Optic Character
Specific Gravity
Mohs Hardness
Talisman
Cobaltite
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0.07
-9999
-
6.3
5.5
-
Adamite
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0.06
1.708-1.722
Biaxial/+
4.32-4.48
3.5
-
Anglesite
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0.04
1.877-1.894
-
6.30-6.39
3-3.5
-
Benitoite
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0.04
1.757-1.804
-
3.61-3.68
6-6.5
-
Hureaulite
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0.02
1.647-1.667
-
3.19
3.5
-
Charoite
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0.02
1.545-1.560
-
2.54-2.78
5-6
-
Axinite
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0.02
1.656-1.704
Biaxial/+
3.26-3.36
6.5-7
-
Corundum
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0.02
1.758-1.780
-
3.90-4.05
9
-
Hodgkinsonite
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0.02
1.720-1.746
-
4.06-4.08
4.5-5
-
Poudretteite
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0.02
1.511-1.532
-
2.51-2.53
5
-
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