A sandstone quarry was developed on Saturna Island within the Upper Cretaceous Cedar District Formation of the Nanaimo Group. The sandstone is buff coloured, medium-grained (0.06 to 2 millimetres), and displays a uniform texture. The quarry is 175 metres long and was developed in a series of benches between 2 and 8 metres high. Bedding strikes northwest dipping moderately northeast. One prominent set of joints strike northwest dipping steeply southwest while a second set (vertical) strikes north-northeast. A joint and fracture density survey indicates 66 per cent of vertical joints are spaced greater than 1 metre apart and 15 per cent greater than 3 metres apart.

Saturna Island sandstone was used (in part) to construct the Carnegie Library in Victoria and other heritage buildings in the coast region. Potential reserves of sandstone extend north of the worked faces. No production figures are available.