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
2.71-2.723.04-3.17
1
7.18
1.5 Fracture
Handbook of mineralogy (2001), Difficult, Fibrous
Uneven, Uneven, Gemstones of the world (2001) More from other references
1.6 Cleavage
{???} Good
{001} Indistinct, {???} Indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references