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Optic Character


Clarity


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Gems for Libra

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Gemstones
Dispersion
Refractive Index
Optic Character
Specific Gravity
Mohs Hardness
Talisman
Peridot
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0.02
1.64-1.69
-
1.54-1.55
6.5-7
-
Sapphire
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0.02
1.762-1.788
-
3.95-4.03
9
-
Kyanite
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0.02
1.71-1.74
-
3.53-3.65
4-7
-
Iolite
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0.02
1.52-1.56
-
2.6-2.7
7-7.5
-
Tourmaline
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0.02
1.614-1.666
-
2.85-3.35
7-7.5
-
Chrome Tourmaline
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0.02
1.614-1.666
-
2.85-3.35
7-7.5
-
Morganite
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0.01
1.573-1.600
-
2.71-2.90
7.5-8
-
Prasiolite
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0.01
1.544-1.553
-
2.65
7
-
Ametrine
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0.01
1.544-1.553
-
2.65
7
-
Jade
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0.01
1.600-1.688
-
2.90-3.38
6-7
-
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