Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.30-2.502.90-2.98
1
7.18
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Fracture
Uneven
Conchoidal, ConchoidalWalter Schumann
Cleavage
Perfect on (001)
Distinct on {11 2 0}, imperfect on {10 1 1}
Mohs Hardness
4.5-57.5-8
2
10
👆🏻
Chemical Composition
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references