Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
3.80-4.152.74-3.00
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
perfect along [010] and [100]
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
3.5-45-5.5
2
10
👆🏻
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.