Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
4.392.72-2.75
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
7.5-86-6.5
2
10
👆🏻
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)