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Optic Character


Clarity


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Blue Gemstones

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Gemstones
Dispersion
Refractive Index
Optic Character
Specific Gravity
Mohs Hardness
Talisman
Anatase
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0.21
2.488-2.562
-
3.82-3.97
5.5-6
-
Aragonite
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0.17
1.525-1.686
-
2.93-2.96
3.5-4
-
Covellite
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0.08
1.45-2.62
-
4.6-4.76
-9999
-
Boleite
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0.07
2.05
-
5.05
3-3.5
-
Azurmalachite
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0.07
1.655-1.909
Biaxial/+
3.70-3.95
3.5-4
-
Adamite
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0.06
1.708-1.722
Biaxial/+
4.32-4.48
3.5
-
Caledonite
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0.05
1.818-1.909
-
5.6-5.76
2.5-3
-
Falcons Eye
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0.05
1.534-1.540
-
2.58-2.64
7
-
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
-
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