The area of the Nature Boy occurrence is apparently underlain by the Early Jurassic Rossland monzonite, a biotite-hornblende-augite monzonite stock which intrudes the Lower Jurassic Rossland Group, Elise Formation. The monzonite is medium-grained, grey to green in colour and hosts magnetite, apatite, some sphene with chlorite, epidote, and pyrite.

In 1949, 3.6 tonnes of ore were mined from surface stripping from which was recovered 1062.8 grams per tonne silver, 85.3 kilograms lead, and 40.8 kilograms zinc.