Tenacity
-
-
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
3.07-3.133.62-3.87
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
None
Mohs Hardness
3-3.57-7.5
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)