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Rhyolite
Rhyolite
☒

Sinhalite
Sinhalite
☒



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Rhyolite
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Sinhalite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
-
None
7
70% SiO2, Al2O3, Na2O, K2O
 
-
-
-
3.46-3.50
Conchoidal
Perfect
6-7
MgAlBO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references