1 Physical Properties
1.1 Tenacity
1.3 Solubility
1.5 Durability
Not Available
Not Available
1.7 Specific Gravity
1.8 Fracture
Uneven
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
1.9 Cleavage
{110} Good
{100} imperfect, {110} indistinct; partings on {111} or {011}
1.10 Mohs Hardness
2.5 Chemical Composition
MgB 3O 3(OH) 5 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references