Tenacity
-
-
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.04-3.172.36
1
7.18
👆🏻
Fracture
Uneven
Uneven, Subconchoidal, Fibrous
Cleavage
{001} Indistinct, {???} Indistinct
[110] perfect, [101] good, [010] distinct
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
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references