Paratacamite

IMA formula: Cu₃(Cu,Zn)Cl₂(OH)₆

Crystallography: Trigonal. R-3. a = 13.654(5) Å, c = 14.041(6) Å. Z = 24.

Specimen #68. Paratacamite. Geevor Mine, Pendeen, St Just, Cornwall, England, UK. FOV 2.6 mm.