Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.9-3.53.62-4.33
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
Indiscernible
Mohs Hardness
5.5-67-7.5
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)