The Garnet No.1 occurrence is located at an elevation of approximately 1200 metres on a south- facing slope, west of Argyle Creek and north of St. Mary Lake.

The area is underlain by argillites and quartzites of the middle Proterozoic Aldridge Formation (Purcell Supergroup). These have been intruded by gabbro sills and dikes of the middle Proterozoic Moyie Intrusions.

Locally, quartzites in contact with a diorite sill that strikes 320 degrees and dips 90 degrees host massive sulphides (chalcopyrite and pyrrhotite) associated with garnet, feldspar and hornblende over approximately 120 metres.

In 1987, a rock sample (KDR-87-011) assayed 0.115 per cent copper (Assessment Report 16971).

In 1995, a sample (Garnet 19) assayed 0.103 per cent copper, 0.14 gram per tonne gold and 1.8 grams per tonne palladium, whereas another sample (Garnet 12) yielded 0.899 per cent copper and 5.4 grams per tonne silver and sample Garnet 22 yielded 0.97 gram per tonne gold (Assessment Report 24295).

Silver mineralization is reported to the east on the former Hidden Treasure (L.1745), Minnie Ha Ha (L.1744), Matterhorn (L.1743) and Columbia (L.1746) Crown grants.

Historic workings in the area include at least three adits of unknown length and age, which likely date back to the early 1900‘s. In 1983, Trans-Arctic Explorations completed a ground electromagnetic survey on the area immediately south as the P.C. 1 claim. The following year, a program of geological mapping was completed. In 1987, Esso Resources completed a program of rock and silt sampling, geological mapping and a 3.0 line-kilometre electromagnetic survey on the area as the Mac 1-10 claims. In 1995, the area was prospected as the Garnet No.1 claim. In 2011, the area was prospected and sampled by DW Exploration as the Wilcum property.