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Gems Found In Africa
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Optic Character


Clarity


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48 Gemstones Found
Gemstones
Dispersion
Refractive Index
Optic Character
Specific Gravity
Mohs Hardness
Talisman
Cyprine of Berzelius
Cyprine of Berzelius
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Not Available
1.698-1.723
Not Available
3.25-3.50
6-7
Not Available
Cuprite
Cuprite
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Not Available
2.849
Not Available
5.85-6.15
3.5-4
Not Available
Cubic Zirconia
Cubic Zirconia
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Not Available
2.150-2.182
Not Available
5.50-6.00
8.5
Not Available
Crocoite
Crocoite
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Not Available
2.31-2.66
Not Available
5.90-6.10
2.5-3
Not Available
Cristinite
Cristinite
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Not Available
1.61-1.63
Not Available
2.6-3.6
6.5-7
Not Available
Corundum
Corundum
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0.02
1.758-1.780
Not Available
3.90-4.05
9
Not Available
Cordierite Iolite
Cordierite Iolite
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0.02
1.542-1.578
Biaxial/+
2.56-2.66
7-7.5
Not Available
Coral
Coral
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None
1.486-1.658
Not Available
2.60-2.70
3-4
Not Available
Common Opal
Common Opal
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None
1.37-1.52
Not Available
1.98-2.50
5.5-6.5
Not Available
Colemanite
Colemanite
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Not Available
1.584-1.615
Not Available
2.40-2.42
4.5
Not Available
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