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Povondraite
Povondraite
☒

Tortoiseshell
Tortoiseshell
☒



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Povondraite
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Tortoiseshell
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.26
Uneven
None
-9999
NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)
 
-
-
-
1.25-1.35
-
None
-9999
-

Compare Brown Gemstones

Brown Gemstones

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Kutnohorite
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Tortoiseshell Vs Staurolite
Tortoiseshell
Tantalite
Tortoiseshell Vs Tantalite
Tortoiseshell
Zoisite
Tortoiseshell Vs Zoisite

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