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Musgravite
Musgravite
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Taaffeite
Taaffeite
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Musgravite
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Taaffeite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.62-3.68
Conchoidal
Distinct
8-8.5
(Mg,Fe,Zn)Al 6BeO 12Ulrich Henn and Claudio C.
 
-
-
-
3.60-3.61
Conchoidal
Imperfect/fair/absent
8-8.5
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references