This particular beryl locality is just south of Midge Creek about 1.6 kilometres from Kootenay Lake (Rice, personal communication, in Geological Survey of Canada Economic Geology Series 23). Beryl was found in large blue-green crystals, with garnet, magnetite and black tourmaline in pegmatite dikes, which are reported by Rice (Geological Survey of Canada Memoir 228) to be abundant in that part of the middle Cretaceous Bayonne batholith comprising granite and granodiorite.