Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.01-3.065.9-6.3
1
7.18
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Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
Indiscernible
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
7-7.54.5-5
2
10
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Chemical Composition
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.
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references