Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.07-3.132.58-2.74
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
ConchoidalWalter Schumann, Splintery
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
{100} Distinct, {110} Distinct
Mohs Hardness
3-3.55.5-6
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references