1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.2 Durability
Not Available
Not Available
1.4 Specific Gravity
3.04-3.172.58-2.80
1
7.18
1.15 Fracture
Uneven, Uneven, Gemstones of the world (2001) More from other references
Uneven, Irregular, Management Team (2012)
1.16 Cleavage
{001} Indistinct, {???} Indistinct
Not Available
1.17 Mohs Hardness
1.18 Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)