SUMMARY
This paper reviews the geology, mineralogy, and origin of the gem varieties of beryl, including emerald (green) and aquamarine (blue); it focuses on western Canada, especially the Yukon Territory, because this is where most of the recent discoveries have been made. However, emerald occurrences in Ontario are also considered, including Canada's first reported discovery in 1940. Beryl ([Be.sub.3][Al.sub.2][Si.sub.6][O.sub.18]) is relatively common and spatially associated ...