Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.30-2.603.07-3.13
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal, Uneven
Cleavage
{111} Imperfect
{100} Perfect, {010} Distinct, {102} Distinct
Mohs Hardness
5.5-63-3.5
2
10
👆🏻
Chemical Composition
Na 4AlBeSi 4O 12ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references