The Copper King showing is located 8 kilometres east of Alberni Inlet beside the logging road north of Coleman Creek. The location is uncertain from the description (Minister of Mines Annual Report 1928, page 366).

The region is underlain by Vancouver Group rocks comprising Upper Triassic Quatsino Formation limestones overlain by Lower Jurassic Bonanza Group volcanics. These are intruded by granitic rocks of the Early to Middle Jurassic Island Plutonic Suite. Northwest trending Tertiary faults cut the underlying rocks.

A massive pyrrhotite vein, up to 2.4 metres wide with trace chalcopyrite occurs within a gangue of hornblende with associated garnetite, epidote and quartz. The vein is reportedly traced "for some distance". No host rock is mentioned, but the showing plots in rocks mapped as granites of the Island Plutonic Suite. Mineralization suggests skarnification.

In 1900, a bulk sample from a 27.3 metre adit assayed 18 per cent copper and "gold $6.00 per ton" (Minister of Mines Annual Report 1900, page 921). Previous work includes trail improvements, prospecting and trenching; a nearby opencut exposed "clean" chalcopyrite up to 1.8 metres wide (Minister of Mines Annual Report