The Elaho River quarry, about 44 kilometres north of Squamish, is opened in a quartz diorite phase of the Tertiary to Jurassic Coast Plutonic Complex.

The stone is fine to medium-grained with a parallel texture well defined by orientation of mica flakes. The rock is exposed in steep cliffs and along the banks of the Elaho River, some 7.5 kilometres upstream from its confluence with the Squamish River. The fracture spacing, several metres apart, allows removal of large blocks from the quarry face with a minimum of waste. The only observed inhomogenities in the quarry area are two light-coloured fine-grained aplitic dikes 10 to 20 centimetres thick. The square-shaped blocks are processed by Margranite Industry Ltd. into granite tile in Surrey, British Columbia and marketed under the trade name of Whistler White granite.

Stone from Elaho River is a distinctive white granodiorite that has prominent parallel fabric defined by the mafic minerals. It is fine to medium grained with a uniform texture. Major constituents are white plagioclase, colourless, glassy quartz and black biotite. Chloritization of biotite and virtual total replacement of minor augite gives the mafics a greenish tinge. Notable highlights are small (+/- 1 millimetre) red garnets that are scattered through the rock. Minor minerals are sphene, (clino?)zoisite, apatite, magnetite and pyrite. The grains are will interlocked and the fabric seen at the macroscopic scale is not apparent at the microscopic scale.

The rock is reasonably fresh considering the modest amount of chloritization and the feldspars are unaltered. There is no iron staining from the pyrite or magnetite (+/- 1 per cent combined). The polish is very good (8/10) with only slight pitting on biotite/chlorite grains and there are no fractures or significant cracks.