Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.77-2.883.95-4.10
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
Perfect basal
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
2.53.5-4
2
10
👆🏻
Chemical Composition
K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references