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
2.32-2.383.04-3.17
1
7.18
1.5 Fracture
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Uneven, Gemstones of the world (2001) More from other references
1.6 Cleavage
Not Available
{001} Indistinct, {???} Indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references