Clinoclase 

 Formula: Cu3(AsO4)(OH)3
System: Monoclinic
Colour: Blue, greenish-blue, ...
Lustre: Vitreous, Pearly
Hardness: 2½ - 3

From Chile. 

Type Locality
Wheal Gorland, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK

Photo: Stone Ásványfotós
 
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