Wheal Carpenter, Gwinear, Cornwall.
A large polished slab displaying brass yellow chalcopyrite cut through with stringers of deep purple bornite in a pale chlorite matrix with minor quartz.
This is the last of three slices cut from a single specimen which was collected from an organised dig in the 1990's, see last photo.
A rich and unusual specimen for the locality.
Size 13.5 x 12 x 1.5 cm