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Rubellite
Rubellite

Zinnwaldite
Zinnwaldite



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Rubellite
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Zinnwaldite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.01-3.06
Conchoidal
Indiscernible
7-7.5
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
 
Elastic
-
-
2.9-3.1
Uneven
Perfect basal {001}
3.5-4.0
-