Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.34-9999
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
None
-
Mohs Hardness
-9999-9999
2
10
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Chemical Composition
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
SiO2, Al2O3, CaO, MgO, FeO