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Clinoclase, St Day, Gwennap, Cornwall, England
Spheroidal clinoclase coating liroconite, 4.5 cm in diameter. The specimen is probably from Wheal Gorland or Wheal Unity. Collector Philip Rashleigh wrote in his mineral catalogue: 963 A globular copper ore in plated crystals the surface of the darkest blue or black colour probably colouring copper ore of a sky blue colour'. Clinoclase was first discovered in Cornwall and the type locality is Wheal Gorland. Although first described by Rashleigh, the mineral was not formally named until after his death. Rashleigh Collection
© RIC, photographer A.G. Tindle