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Optic Character


Clarity


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Semi Precious Gemstones

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Gemstones
Dispersion
Refractive Index
Optic Character
Specific Gravity
Mohs Hardness
Talisman
Tanzanite
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0.03
1.685-1.707
-
3.35
6.5-7
-
Turquoise
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0.03
1.610-1.650
-
2.30-2.90
5-6
-
Rhodolite
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0.03
1.760
-
3.84
7-7.5
-
Hessonite
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0.03
1.742-1.748
-
3.55-3.73
7-7.5
-
Hackmanite
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0.03
1.483-1.487
-
2.27-2.33
5.5-6
-
Almandine
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0.03
1.770-1.820
-
3.95-4.30
7-7.5
-
Transvaal Jade
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0.03
-9999
-
3.55-3.73
7-7.5
-
Spessartine
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0.03
1.789-1.820
-
4.12-4.18
7-7.5
-
Schorlomite
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0.02
1.94-1.98
-
3.77-3.93
7-7.5
-
Umbalite
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0.02
1.730-1.820
-
3.62-4.33
7-7.5
-
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