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Vivianite
Vivianite
☒

Chrome-Chalcedony
Chrome-Chalcedony
☒



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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.64-2.70
-
{010} Perfect
-9999
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
 
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-
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2.55-2.70
-
None
6.5-7
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

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