Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.552.74-2.76
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
None, but may exhibit slight parting
{010} Perfect, {001} Distinct
Mohs Hardness
7.5-83.5-4
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)