The Okanagan Sunset deposit is located 11 kilometres southwest of Vernon, near the east shore of Okanagan Lake.

In this area, Devonian to Triassic sediments of the Harper Ranch Group are intruded by Middle Jurassic granitic rocks. These are intruded by Eocene granites and hypabyssal equivalents of the Coryell Intrusions. Patches of Eocene Penticton Group volcanic rocks overlie the older rocks.

The Eocene Coryell granite has been quarried for industrial use. It has an attractive fresh pale pink tone, is medium to coarse-grained and contains pink orthoclase feldspar crystals up to 8 millimetres in length. Weathered surfaces are light to dark grey with occasional yellow iron staining. Potential reserves exist in a well-defined ridge of granite, northeast of the abandoned face. This ridge is 80 metres long, 25 metres wide with a face up to 20 metres high. Spacing between joints and fractures is irregular although 48 per cent are spaced greater than 50 centimetres apart.

In 1969, Columbia Marble Company opened the quarry and operated for some time afterwards. Stone was shipped to the company's processing plant in Burnaby where it was cut into slabs to be used as facing stone. The stone has also been crushed and used as aggregate for decorative slabs. Similar stone, from the Vernon Granite quarry (082LSW087), was used in the Vernon courthouse.