Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.173.87-4.14
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Conchoidal
Cleavage
{001} Indistinct, {???} Indistinct
Poor on {120}, in traces on {001}
Mohs Hardness
5.55.5-6
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references