The area of the Ruby occurrence is underlain by basalt and massive to locally bedded chert of the Permian to Jurassic Hozameen Complex. Basalt-chert contacts are steeply dipping and probably faulted. Small intrusions of diorite to granodiorite of unknown, but probable Tertiary age occur in the basalt. A fault striking 015 degrees along Pyrrhotite Creek truncates a 120 degree striking fault that passes through the Giant Creek area. Monger has mapped another west-northwest striking fault in the valley north of the property (GSC Map 12-1969).

Over several square kilometres, the basalt is altered and veined. Alteration consists mainly of silicification and lesser sericitization. Three main types of mineralization are reported to occur in the vicinity. These include skarn, veins and porphyry types.

In 1938, Sargent reported that this showing, occurring on the old Ruby claim, was one of two promising "replacement" showings in the area (Minister of Mines Annual Report 1938, page F19). The showing appeared to occur in irregular masses or pods of impure limestone.

Sargent reported two cuts about 30 metres apart, on the steep slope east of Antimony Creek, expose sulphide mineralization of "good width". In the northerly cut, massive mineralization is developed in shears striking east and dipping 25 degrees south. Mineralization also cuts through the hangingwall of the shear in small chimney-like masses. The types of sulphides were not reported but a sample of the material taken across the shear yielded 3.43 grams per tonne gold, 0.35 per cent copper, a trace of silver and nil zinc over 2.4 metres (Minister of Mines Annual Report 1938, page F19).