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Sinhalite
Sinhalite

Thulite
Thulite



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Sinhalite
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Thulite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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-
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3.46-3.50
Conchoidal
Perfect
6-7
MgAlBO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
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3.1
Uneven, Conchoidal
Perfect {010} imperfect {100}
6-7
Ca2Al3(SiO4)3(OH)