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Witherite
Witherite
☒

Rhyolite
Rhyolite
☒



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Witherite
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Rhyolite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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-
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4.27-4.35
Conchoidal
{010} Distinct
3-3.5
BaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
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-9999
-
None
7
70% SiO2, Al2O3, Na2O, K2O