The Green Gables Main showing is located 16 kilometres west- southwest of Vernon, between lower Whiteman Creek and Okanagan Lake.

In the area, sedimentary and volcanic rocks of the Devonian to Triassic Harper Ranch Group are unconformably overlain by Upper Triassic to Lower Jurassic Nicola Group sedimentary and volcanic rocks. These units are intruded by Middle Jurassic granitic rocks of the informally named Terrace Creek batholith. Feldspar porphyry dikes, of possible Tertiary age, cut the granitic rocks. Eocene Penticton Group volcanic rocks overlie the igneous and sedimentary rocks.

Middle Jurassic quartz monzonite and, to a much lesser degree, later feldspar porphyry dikes host fluorite mineralization. Silica and clay alteration of the intrusive rocks, along with iron and manganese staining, has occurred in zones of fracturing. In the altered zones, fluorite occurs as: lenses and irregular masses in irregular, drusy quartz veins; thin veins; and as films on fracture planes. The fracture-fillings and veins generally range from 1 to 10 centimetres thick. The coarsely crystalline fluorite is usually pale green with occasional white, yellow or purple varieties. The showings seem to be associated with a general north-south fracture zone. Fluorite masses, up to 25 by 45 centimetres, are reported.

In 1963-64, trenching was carried out on the property. In 1966, Canex Aerial Exploration Ltd. carried out trenching and drilling. In 1968, Kelver Mines Ltd. conducted geological mapping, trenching and drilling and Cerro Mining Company of Canada Ltd. conducted geological mapping and a hydro-geochemical survey in 1971. The general area was explored for gold mineralization in the 1980s.