Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
35.9-6.3
1
7.18
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Fracture
-
Conchoidal, Uneven
Cleavage
None
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
-99994.5-5
2
10
👆🏻
Chemical Composition
◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references