1 Physical Properties
1.1 Tenacity
1.4 Solubility
Not Available
Not Available
1.6 Durability
Not Available
Not Available
1.7 Specific Gravity
1.8 Fracture
Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Conchoidal, Brittle
1.9 Cleavage
Absent
{001} perfect; {111} imperfect, may exhibit parting on , {011}
1.10 Mohs Hardness
1.11 Chemical Composition
SiO2
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)