Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.80-4.154.39
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
perfect along [010] and [100]
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
3.5-47.5-8
2
10
👆🏻
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)