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Sonolite
Sonolite
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Chrome Tourmaline
Chrome Tourmaline
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Sonolite
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Chrome Tourmaline
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.82-4.00
-
{???} Indistinct
5.5
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
 
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-
-
2.85-3.35
Conchoidal
3,2
7-7.5
Tourmaline is a series of several different minerals with unique chemical formulas.

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