Description:  Heavy slab of brown banded metamorphosed sediment bearing silver carrollite, yellow chalcopyrite, irridescent purple bornite. Labelled in black on a white painted ground "CWIV." Attached descriptive list from Roan Consolidated Mines Limited states "CW IV. Mainly carrollite with minor chalcopyrite and bornite. Banding equals beeding plabnees. Unusual specimen as carrollite usually occurs as irregular masses or bleb like disseminations as in specimen V. Very rarely as a concentration parallel to bedding."