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Pleonaste
Pleonaste
☒

Hambergite
Hambergite
☒



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Pleonaste
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.80
-
Indistinct
8
(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)
 
Brittle
-
-
2.33-2.37
ConchoidalWalter Schumann
Perfect on {010}, good on {100}
7.5
Be 2BO 3(OH)Ulrich Henn and Claudio C.

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Sard
Hambergite
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Hambergite
Precious Opal
Hambergite Vs Precious Opal

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