Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.07-3.132.74-2.90
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, Splintery
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
Perfect on {100} and {001}
Mohs Hardness
3-3.54.5-5
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.