Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.635.35
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
{001} Perfect, {010} Good
Perfect on {100}, imperfect on {001}
Mohs Hardness
6-6.52.5
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)