International News
Rio Tinto Unveils Rare 158ct Yellow Diamond from Diavik Mine in Canada
One of the largest gem-quality yellow diamonds ever discovered in Canada, the 158.20-carat gem is a remarkable find as Diavik Mine nears closure.
Rio Tinto has uncovered a rare and exceptional 158.20-carat yellow diamond at its Diavik Mine in Canada, marking one of the largest gem-quality yellow diamonds ever found in the country. This stunning discovery is also among only five yellow diamonds weighing over 100 carats to be unearthed by the company at Diavik throughout its 22-year history. Notably, Diavik is primarily known for producing white diamonds, with less than 1% of its output being yellow stones.
The Diavik Mine, which is set to close next year, is also responsible for several significant yellow diamond finds, including Canada’s largest yellow diamond, a 552.74-carat gem discovered in 2018, and the 187.7-carat Diavik Foxfire found in 2015.
With the closure of the Argyle mine in Australia in 2020, Diavik is now Rio Tinto’s sole diamond asset. Patrick Coppens, General Manager of Sales and Marketing for Rio Tinto’s diamond business, expressed excitement over the unique beauty and purity of the Diavik diamonds, eagerly anticipating the future of this extraordinary find.
International News
Swiss International Gemlab Launches with Proprietary AI for Precise Colored Gemstone Grading
Swiss International Gemlab promises Faster, More Accurate Certification, Ensures Report Consistency
Three veteran gemologists today announced the opening of Swiss International Gemlab (SIG), a cutting-edge facility leveraging proprietary artificial intelligence (AI) to enhance grading accuracy and consistency for colored gemstones.
Founded by Willy Bieri, Lawrence Hahn, and Matthias Alessandri—senior experts who have collaborated for over a decade—SIG will operate from state-of-the-art locations in Lucerne, Switzerland, and Hong Kong. The lab promises faster results, unmatched transparency, and scientific rigor, insulated from external influences.
SIG delivers a full spectrum of services, including gemstone identification, origin determination, treatment analysis, and advanced color grading. At its core is SIG-AI Assistance, a proprietary system that cross-references analytical data against structured databases to detect anomalies, ensure report consistency, and slash interpretation time.
With a standard turnaround of five business days—plus expedited options for urgent needs—and real-time status tracking, SIG sets a new benchmark for efficiency and reliability in gem certification. The lab will make its global debut at this year’s GemGenève in May, offering on-site services to industry professionals.
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