Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.07-3.133.21-3.38
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Irregular/uneven, Uneven
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
Perfect on {001}
Mohs Hardness
3-3.56-7
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references