Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.43-3.442.55-2.63
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
None Observed
{001} Perfect, {010} Good
Mohs Hardness
6.5-76-6.5
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAlSi 3O 8Arthur Thomas , Gemstones (2009)