The Blue Eyes showing is underlain by a non-porphyritic granodiorite of the Middle to Late Jurassic Trail pluton (Nelson Intrusions) that contains small shears and joints along which quartz veins are exposed in an adit driven westward at an elevation of 1371 metres. In trenches, five or more quartz veins, ranging up to 10 centimetres in width, host crystals of scheelite which range up to 2.0 centimetres in length. In general, these large crystals are in clusters and give a high tungsten content over a few square centimetres. However, the average grade of the veins is low.

An adit followed a series of small joints and shears that contain quartz veins bearing pyrite. Scheelite is present almost the whole length. Some of the veins are up to 30 centimetres in width and host scheelite along the margins. The smaller veins occupy joints in the granodiorite with scheelite disseminated in the veins and penetrating several centimetres into the wallrock. In 1942, a channel sample taken across 30 centimetres of vein and wallrock about 121 metres from the portal, assayed 0.33 per cent WO3 and 0.17 per cent MoS2 (Geological Survey of Canada Economic Geology Series No. 17).