1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.04-3.263.90-4.00
1
7.18
1.5 Fracture
Splintery, Brittle, Uneven
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
{110} perfect
Perfect on {001}, good on {210}, poor on {010}
1.7 Mohs Hardness
1.8 Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references