Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.03-3.182.24-2.29
1
7.18
👆🏻
Fracture
Uneven, Irregular, Conchoidal
Uneven, Subconchoidal, Conchoidal
Cleavage
{???} Indistinct
Very poor [100]
Mohs Hardness
7-7.55-5.5
2
10
👆🏻
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references