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
2.60-3.022.69-2.72
1
7.18
1.5 Fracture
Uneven
Uneven, Conchoidal, Gems, Sixth Edition (2006)
1.6 Cleavage
{001} Perfect
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
1.7 Mohs Hardness
1.11 Chemical Composition
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
(Na,Ca)1-2Si3-2O8