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
2.69-2.723.95-4.10
1
7.18
1.5 Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
UnevenWalter Schumann, Gemstones of the world (2001) More from other references, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Uneven
1.6 Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
{110} Perfect, {110} Perfect, {110} Perfect
1.7 Mohs Hardness
1.8 Chemical Composition
(Na,Ca)1-2Si3-2O8
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references