The To showing is situated near the contact between the Ordovician Little Shuswap orthogneiss of the Mount Ida Group and the Hadrynian and/or Paleozoic Silver Creek Formation. In the showing area, the Little Shuswap orthogneiss comprises granitic to dioritic gneisses and the Silver Creek Formation comprises mica schists and amphibolites.

Fluorite is observed in amphibolite and granite gneiss (described as andesite and syenite respectively, in Assessment Report 3915). The fluorite is associated with fractures, either as a constituent of quartz veins up to 20 centimetres wide, or as a thin coating on fracture surfaces. Where the fluorite occurs as coatings on fracture surfaces, it averages about 2 millimetres wide although in some instances the coatings attain a width of about 10 millimetres.

The fluorite mineralization is associated with a fracture system that strikes to the northeast and dips steeply either to the northwest of southeast. The fluorite mineralization occurs over a distance of 485 metres.