Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.823.85-3.94
1
7.18
👆🏻
Fracture
-
Conchoidal, Uneven
Cleavage
Perfect in one direction, indistinct in one direction
{010} Good, {100} Distinct
Mohs Hardness
65-5.5
2
10
👆🏻
Chemical Composition
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)