Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.07-3.132.66-2.86
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
ConchoidalWalter Schumann
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
Indiscernible
Mohs Hardness
3-3.57.5-8
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2Be 3Si 6O 18Martin H.