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Fire Opal
Fire Opal
☒

Manganotantalite
Manganotantalite
☒



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Fire Opal
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Manganotantalite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
 
-
-
-
-9999
Conchoidal
None
5.5-6.5
MnTa 2O 6Walter Schumann , Gemstones of the world (2001) More from other references