Paratacamite

Paratacamite – Cu₃(Cu,Zn)Cl₂(OH)₆

Elements: Copper, Zinc, Chlorine, Oxygen, Hydrogen

Class: Halides

Crystal System: Hexagonal

Hardness: 3

Calcite

Talc (1)Diamond (10)

A copper coin can scratch it.

Quartz – SiO₂

Elements: Silicon, Oxygen

Class: Silicates – Tectosilicates

Crystal System: Hexagonal

Hardness: 7

Quartz

Talc (1)Diamond (10)

Very hard. Scratches glass and steel.

Origin: Lily Mine, Pisco Umay, Ica – Peru