Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.82-4.003.95-4.10
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
{???} Indistinct
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
5.53.5-4
2
10
👆🏻
Chemical Composition
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references