New research could make it easier to find high-quality Canadian sapphires
Researchers from the University of British Columbia’s Department of Earth, Ocean and Atmospheric Sciences discovered that it takes a fairly specific sequence of pressure and temperature events to create Beluga sapphires in Nunavut.
“It’s essentially a recipe,” said Graduate Student Philippe Belley, lead author of a study that was published this week in the journal Canadian Mineralogist.
Belley explained in a press release that once he and his colleagues discovered what chain of events from Earth’s history was required to form sapphires in marble-related deposits on Baffin Island, they compared that information to regional data to pinpoint the most promising areas for sapphire exploration.
Those areas are expected to occur near a fault that separates the Lake Harbour Group and Narsajuaq terranes.
According to UBC mineralogist and expert on gem deposits Lee Groat, the new findings not only will facilitate gemstone exploration in that specific section of the Arctic but can be also applied to exploration in other parts of the world.
Beluga sapphires, specifically 48 of them, are the gems that adorn Queen Elizabeth II’s Sapphire Jubilee Snowflake Brooch. The piece also has 400 diamonds from northern Canada, all set in Canadian white gold.
The gems in the brooch were discovered near Kimmirut, Baffin Island, by brothers Nowdluk and Seemeega Aqpik in 2002. That location is Canada’s only known deposit of sapphires.