Chalcocite (Chalcosine) – Redruth, Cornwall, UK
 Ex École des mines, Paris, around 1850
 A richly decorated, historic collector's item with old labels from the École des mines in Paris. Based on the labels, this rare chalcocite specimen can be dated to around 1850.
 The specimen displays numerous blocky crystals of the highest quality. It is also richly covered with malachite.
 Rare collection with well-documented history.