Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.563.355-3.433
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
{110} Perfect, {010} Indistinct
{???} Good, {???} Good
Mohs Hardness
5.5-6-9999
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)