Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.77-2.882.9-3.5
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
Perfect basal
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
2.55.5-6
2
10
👆🏻
Chemical Composition
K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)