Olive-green prismatic crystals of olivenite.
Olivenite, Chrysocolla, Clinoclase, Wheal Gorland, Cornwall
Olive-green olivenite with pale blue chrysocolla and clinoclase (not in picture).
Chalcophyllite, Wheal Gorland, Cornwall
Transparent platy green crystals of chalcophyllite.
Pharmacosiderite, Chalcophyllite, Wheal Gorland, Cornwall
Green cubes of pharmacosiderite with pale blue platy chalcophyllite.
Clinoclase, Wheal Gorland, Cornwall
Blue Clinoclase crystals on matrix from St. Day, Cornwall, England. Ex Bob Rothenberg collection, previously from the John Frederick Calvert collection (died 1897).