Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.763.65-4.55
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
None, but may exhibit slight parting
Mohs Hardness
3.5-47.5-8
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)