1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.4 Durability
Not Available
Not Available
1.6 Specific Gravity
2.71-2.722.90-3.10
1
7.18
1.9 Fracture
Handbook of mineralogy (2001), Difficult, Fibrous
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
1.11 Cleavage
{???} Good
Poor/indistinct on {1120} and {1011}
1.13 Mohs Hardness
1.15 Chemical Composition
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references