Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.174.32-4.48
1
7.18
👆🏻
Fracture
Uneven
Uneven, Subconchoidal, Conchoidal
Cleavage
{001} Indistinct, {???} Indistinct
{101}, good; {010}, poor
Mohs Hardness
5.53.5
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)