1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, Brittle, Conchoidal
1.6 Cleavage
On {10 1 0}, perfect; parting on {000 1 }
Good on [110] and on [001]
1.7 Mohs Hardness
1.8 Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
[ ]Na2(Mg3Al2)Si8O22(OH)2