Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.633.05-3.21
1
7.18
👆🏻
Fracture
Uneven
Uneven, Subconchoidal, Splintery
Cleavage
{001} Perfect, {010} Good
Good on {110}, poor on {100}
Mohs Hardness
6-6.57.5
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references