The Lefroy showing is located 13 kilometres southwest of Vernon, on 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 of the informally named Terrace Creek batholith. These are intruded by granites and hypabyssal equivalents of the Eocene Coryell Intrusions. Patches of Kamloops Group volcanic rocks overlie the older rocks.

The granite was quarried for industrial use. It has a dull, light reddish colour, is medium to coarse-grained, containing pink orthoclase feldspar crystals up to 8 millimetres in length. Quartz is less abundant than feldspar. Plagioclase, biotite and a few grains of olivine are also reported. The quarry is 15 metres long with a face up to 6 metres high. The stone has good rift and grain and is practically devoid of knots or flaws. The rock is jointed but was able to supply fair-sized stone for building purposes.

From 1910 to 1912 about 200 cubic metres were quarried for building purposes and for monument bases by the Vernon Granite and Marble Works.