Tenacity
-
Solubility
-
Durability
-
Specific Gravity
3.18-3.22
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Cleavage
{1011} Indistinct
Mohs Hardness
-9999
2
10
👆🏻
Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)