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Hurlbutite
Hurlbutite

Chlorite group
Chlorite group



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Hurlbutite
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Chlorite group
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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-
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2.90
Conchoidal
None
6
CaBe 2(PO 4) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
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2.6-3.3
Lamellar
Perfect 001
2-2.5
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6