The BR Jewel veins are hosted in Upper Triassic Pioneer Formation (Cadwallader Group) greenstone with nearby or "associated" diorite of the Permian Bralorne Igneous Complex.

The main showing (BRJ #1) is a well-defined ribboned quartz vein having gouge and crushed wallrock on either side. The northeast trending vein averages 1 metre in width and is truncated after 153 metres at its southwest end by a north trending fault. Mineralization consists of local sparse pyrite, tetrahedrite and arsenopyrite. One drill interval assayed 21.9 grams per tonne gold and 60.34 grams per tonne silver over 0.8 metre, and 19.4 grams per tonne gold over 8 metres (Assessment Report 10529). The best assays are reported to occur where the vein is "split" by the fault. Two other veins, one (BRJ #2) 61 metres south of BRJ #1, and another (BRJ #3) 550 metres south-southwest of BRJ #1, are reported barren.