Tenacity
-
-
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.55-2.633.06-3.25
1
7.18
👆🏻
Fracture
Uneven
Sub-Conchoidal, Conchoidal, Uneven
Cleavage
{001} Perfect, {010} Good
Poor/indistinct on {100}
Mohs Hardness
6-6.54.5-5
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)