Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.07-3.133.31
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
-
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
Indiscernible
Mohs Hardness
3-3.5-9999
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaFe 3+ 3 Al 6 (BO 3 ) 3 Si 6 O 18 (O,F,OH) 4 Anthony et al, Handbook of mineralogy (2001)