1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.90-3.403.50-3.60
1
7.18
1.8 Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Brittle, Metallic, Brittle, Metallic, Brittle, Metallic
1.9 Cleavage
Not Available
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
1.10 Mohs Hardness
1.12 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.
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.