Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.77-2.883.07-3.13
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven
Cleavage
Perfect basal
{100} Perfect, {010} Distinct, {102} Distinct
Mohs Hardness
2.53-3.5
2
10
👆🏻
Chemical Composition
K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references