Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.752.74-2.76
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
Perfect on [001], good on [010], imperfect on [110]
{010} Perfect, {001} Distinct
Mohs Hardness
6-6.53.5-4
2
10
👆🏻
Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)