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Gems Found in America
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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
Hardystonite
Hardystonite
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Not Available
1.672
Not Available
3.396-3.443
3-4
Not Available
Gypsum
Gypsum
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Not Available
1.521-1.531
Not Available
2.20-2.40
2
Not Available
Friedelite
Friedelite
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Not Available
1.627-1.663
Not Available
3.06-3.19
4-5
Not Available
Franklinite
Franklinite
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Not Available
Not Available
Not Available
5.05-5.22
5.5-6
Not Available
Fire Opal
Fire Opal
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None
1.370-1.470
Not Available
1.97-2.22
6-6.5
Not Available
Eudialyte
Eudialyte
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Not Available
1.591-1.633
Not Available
2.74-3.00
5-5.5
Not Available
Esperite
Esperite
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Not Available
1.760-1.774
Not Available
4.28-4.42
5-5.5
Not Available
Emerald
Emerald
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0.01
1.565-1.602
Not Available
2.67-2.78
7.5-8
Gemini
Elbaite
Elbaite
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0.02
1.614-1.666
Not Available
2.90-3.10
7
Not Available
Ekanite
Ekanite
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Not Available
1.593-1.596
Not Available
3.28-3.32
6-6.5
Not Available
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