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Charlesite
Charlesite

Tugtupite
Tugtupite



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Tugtupite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
1.79
Irregular/uneven
Perfect on {10bar10}
2.5
Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
 
-
-
-
2.30-2.60
Uneven, Conchoidal
{111} Imperfect
5.5-6
Na 4AlBeSi 4O 12ClMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references