Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.633.70-3.90
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
{001} Perfect, {010} Good
Perfect on {011}, fair on {100}, poor on {110}
Mohs Hardness
6-6.53.5-4
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references