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
Splintery, Granular, Splintery, Granular, Gemstones (2009)
Brittle, Metallic, Brittle, Metallic
1.6 Cleavage
Not Available
{110} Perfect, {010} Perfect
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)