Pyrite, chalcopyrite and galena occur over a width of 1.5 metres in andesite of the Jurassic Hazelton Group. A typical sample assayed 4.0 per cent copper and 27.4 grams per tonne silver (Minister of Mines Annual Report 1914).
On the adjacent Rainbow claim, located at a slightly higher elevation, stringers of chalcopyrite and bornite are reported to occur in fractured Hazelton Group rocks.