The host rocks are comprised of Lower Jurassic Hazelton Group, Telkwa Formation volcanics. They consist mainly of andesite, flow breccia, spherulitic flow-banded rhyolite and massive lapilli tuff.

The Silver Star claim hosts one of the two parallel shears in the Coronado Group which strike 045 degrees and dip 75 degrees to the southeast. This east zone, at 1036 metres elevation, can be traced along strike for 122 metres. An adit in the sheared and brecciated rhyolite exposed galena, sphalerite and minor tetrahedrite. Further to the northeast the shear hosts veinlets of solid sulphides, mainly galena, sphalerite and some tetrahedrite. A grab sample of this weathered and oxidized ore assayed 2.06 grams per tonne gold, 837.2 grams per tonne silver, 11.13 per cent lead and 7.83 per cent zinc (Geological Survey of Canada Memoir 223, page 92).