1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
6.86-7.032.51-2.53
1
7.18
1.5 Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
Conchoidal, Splintery
1.6 Cleavage
{100} imperfect, {110} indistinct; partings on {111} or {011}
None
1.7 Mohs Hardness
1.8 Chemical Composition
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)