Canadian Arctic a prime spot for ‘ridiculously rare’ blue gemstones

Experts say cobalt-blue spinel is prized by jewellers and collectors

Baffin Island holds some of its treasures in plain sight with rocks that produce rare gems sitting exposed to the elements, scientists say.

A new study from the University of British Columbia shows the area is home to a mineral that is prized by jewellers and collectors.

READ MORE: Battle over insurance payout for diamond-encrusted eagle statue allegedly stolen in B.C.

Study co-author Philippe Belley said in an interview that cobalt-blue spinel, “which is a ridiculously rare gemstone” gets a lot of interest from gemologists and jewellers but there’s not enough supply.

The most significant source of the gems is Vietnam, and even then production is limited, said Belley, who’s a PhD graduate within the department of earth, ocean and atmospheric sciences.

He and report co-author UBC mineralogist Lee Groat conducted the first scientific study of the cobalt-blue spinel in Canada.

Baffin Island is “really unique” because it has all the “right ingredients” needed to produce coloured gemstones but the area is “virtually” unexplored, Belley said.

“The rock is extremely well exposed so not only is it easy to see if you have a gem occurrence by just walking on the surface and doing geological mapping, but its also suitable for remote detection methods using drones and satellites to collect data on the rocks.”

Using remote detection can’t be done in most other gem-producing areas because of plant cover or challenging terrain, Belley said.

The researchers analysed 14 occurrences of spinel on Baffin Island, including two of cobalt-blue spinel, to better understand how it forms.

“It’s finding the right chemical components in the right concentration,” he said. “We found that most gem occurrences on Baffin Island were formed from the transformation of a mixture of mud and magnesium-rich limestone under high temperature and pressure.”

They found it was formed 1.8 billion years ago at temperatures of about 800 C, but cobalt was only present in high-enough concentrations to produce gem-quality stones in small, localized areas.

Baffin Island spinel contains up to 500 parts-per-million of cobalt, giving it a vivid blue colour comparable to the best sources worldwide, Belley said in the news release.

Spinel also comes in red, pink and violet, Belley said.

Other gems found on Baffin Island include beluga sapphires, used in the Queen’s sapphire jubilee brooch, and lapis lazuli, a rock used as a gemstone by the Egyptians.

Mining for the gems on Baffin Island wouldn’t necessarily leave a large geographical footprint, he said.

“Most gemstones are either mined from a relatively small mine and a lot of them a mined by one or a few people or families around the world, which is called artisanal mining.”

Hina Alam, The Canadian Press

Like us on Facebook and follow us on Twitter

Just Posted

ATCO gas line work in Lacombe

Lane Closures at the Highway 12/50 Avenue & 58 Street intersection

WATCH: Blackfalds Days Parade takes over community

Floats from all over central Alberta wows crowd

PHOTO: Petvalu donates to Paws and Claws Animal Rescue

$10,782 donated to help animals in central Alberta

Highlights of the Lacombe County council meeting – June 13, 2019

Next Regular Council Meeting is Thursday, June 27

PHOTOS: Blackfalds Minor Baseball Tournament

Teams from all over the province squared off in Blackfalds

WATCH: Blackfalds Days Parade takes over community

Floats from all over central Alberta wows crowd

Update: Two shot, two arrested at Toronto Raptors victory rally

The team and several dignitaries, including Justin Trudeau, remained on stage

Oil and gas sector cautious as deadline on Trans Mountain decision nears

Trudeau government expected to announce whether it will approve pipeline for second time on Tuesday

Feds announce $50M strategy to fight dementia

Emphasis is on prevention and and supporting caregivers

Federal Liberals’ plan to help first-time homebuyers to kick in weeks before election

Ottawa to pick up 5% of a mortgage on existing homes for households that earn under $120,000 a year

No business case for Trans Mountain expansion, says former environment minister

Cabinet is expected to announce its decision on the expansion of the Alberta-to-B.C. pipeline by Tuesday

Alberta Mountie found not guilty of dangerous driving causing pedestrian’s death

RCMP Const. Michelle Phillips also found not guilty of dangerous driving causing bodily harm

Three Albertans land ‘monster’ sturgeon in B.C.’s Fraser River

For angler who landed the exceptionally large sturgeon it was an ‘incredible dream come true’

Most Read