1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
perfect along {110}.
{001} Perfect, {010} Good
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)