1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.5 Solubility
Not Available
Not Available
1.6 Durability
Not Available
Not Available
1.7 Specific Gravity
2.69-2.723.05-3.08
1
7.18
1.8 Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Subconchoidal, Uneven, Conchoidal, Uneven
1.9 Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Poor on {100}
1.10 Mohs Hardness
1.11 Chemical Composition
(Na,Ca)1-2Si3-2O8
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)