1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.6 Specific Gravity
3.19-3.233.30-3.40
1
7.18
1.9 Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Conchoidal, Brittle, Conchoidal
1.10 Cleavage
{110} good
{010} perfect, {110} distinct, {100} in traces
1.11 Mohs Hardness
1.12 Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references