Tenacity
Brittle
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
2.00-2.453.00-3.25
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Conchoidal
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
none
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
2-44
2
10
👆🏻
Chemical Composition
Cu2H2Si2O5(OH)4
CaF2