Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.823.52
1
7.18
👆🏻
Fracture
-
-
Cleavage
Perfect in one direction, indistinct in one direction
{100} Perfect, {001} Perfect
Mohs Hardness
65-5.5
2
10
👆🏻
Chemical Composition
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]
Na(Mn2+ ,Ca) 2Si 3O 8(OH)Michael OâDonoghue , Gems, Sixth Edition (2006)