Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.763.04-3.17
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
{010} Perfect, {001} Distinct
{001} Indistinct, {???} Indistinct
Mohs Hardness
3.5-45.5
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references