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Simpsonite
Simpsonite
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Spessartine
Spessartine
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Simpsonite
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Spessartine
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
Conchoidal
None
7-7.5
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.
 
-
-
-
4.12-4.18
Conchoidal
{???} Distinct
7-7.5
Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)