Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.173.95-4.10
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
{001} Indistinct, {???} Indistinct
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
5.53.5-4
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references