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Iddingsite
Iddingsite

Demantoid
Demantoid



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Iddingsite
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Demantoid
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.5-2.8
-
{???} Perfect
3
MgO.Fe2O3.3SiO2•4(H2O)
 
-
-
-
3.77-3.95
-
Imperfect
6.5
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.