Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.173.23-3.26
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
{001} Indistinct, {???} Indistinct
Perfect on {010} imperfect on {100}
Mohs Hardness
5.56.5-7
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)