1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Brittle, Metallic, Brittle, Metallic
Uneven, Uneven, Gemstones of the world (2001) More from other references
1.6 Cleavage
Perfect on {001}
{001} Indistinct, {???} Indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
Ca(Mg,Al)3(Al3Si)O10(OH)2
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references