Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.80-4.152.9-3.5
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
perfect along [010] and [100]
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
3.5-45.5-6
2
10
👆🏻
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)