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Bertrandite
Bertrandite
☒

Sardonyx
Sardonyx
☒



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Bertrandite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.59-2.60
-
{001} Perfect, {110} Distinct, {101} Distinct
6-7
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
 
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-
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2.55-2.70
-
None
6.5-7
SiO 2Ulrich Henn and Claudio C.

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Sardonyx Vs Colemanite

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