Chrysocolla
Chrysocolla is most often found in botryoidal or bubbly crusts. The colour is typically blue, bluish-green and it has a waxy lustre.
Chemical Formular : Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Hardness : 2.5 – 3.5 on the Mohs Scale
Crystal System : Orthorhombic