The various outcrops of the Silver Moon occurrence are situated along the Similkameen River, in the vicinity of the river's confluence with Copper Creek, about 29.5 kilometres south of Princeton.

The area is underlain by Upper Triassic Nicola Group volcanics which are comprised of a varied assemblage of volcanic flows and pyroclastics with associated greywacke, argillite and minor limestone. Greenschist facies metamorphism has affected the Nicola sequence, and chloritization occurs throughout.

The showings consist of shear zones in fragmental volcanics of the Nicola Group. The principle showing, 120 to 370 metres north of Copper Creek, is comprised of a series of vertical, irregular branching and reticulating shears striking roughly north, contained in three zones up to 4.6 metres wide. The shears range from a few centimetres to a metre in width and are generally pyritized with some quartz vein infillings. The shear zones are accompanied by numerous barren veinlets striking 110 degrees and dipping 60 degrees northeast.

Five flat-lying quartz and calcite veins up to 0.4 metre wide occur amongst the shear zones. These veins have been exposed over lengths of up to 10 metres and are locally mineralized with massive or disseminated arsenopyrite. Native gold is reported to occur in tiny veinlets cutting the arsenopyrite. Microscopic examination indicates that elongate gold particles, less than 10 microns in size, occur aligned on fractures and along arsenopyrite grain boundaries. Two samples collected from the flat veins assayed 6.17 and 1123 grams per tonne gold, and trace and 309 grams per tonne silver respectively (Minister of Mines Annual Report 1938, page D24).

Several shear zones up to 0.6 metres wide, striking north and dipping vertical to steeply east, occur along the river, just south of the previous showings. The zones locally contain quartz and calcite stringers and lenses up to 0.3 metre wide. The stringers strike 110 degrees and are sparsely mineralized with pyrite, arsenopyrite, sphalerite, chalcopyrite and galena.

Between 1938 and 1940, about 7 tonnes of ore were mined, producing 1,027 grams of gold and 374 grams of silver.