Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.07-3.132.90-3.14
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal, Uneven
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
Imperfect; basal
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
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.