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
Gemfields Group CEOÂ Sean Gilbertson Will Step By Mutual Agreement On 15 July 2026
The Company Has Appointed David Lovett As Interim CEO, While He Continues To Oversee The Finance Function, Ensuring Leadership Continuity During The Transition Period.
Gemfields Group has announced that Chief Executive Officer Sean Gilbertson will step down from his position by mutual agreement on 15 July 2026, marking the end of an eight-year tenure at the helm of the coloured gemstone producer. The company has appointed David Lovett as interim CEO, while he continues to oversee the finance function, ensuring leadership continuity during the transition period.
Having assumed the CEO role on 31 March 2018, Gilbertson has played a defining role in shaping Gemfields’ strategic direction, strengthening its global reputation in responsibly sourced coloured gemstones, and advancing the company’s initiatives in sustainability, transparency, and community development. Under his leadership, Gemfields reinforced its position in the emerald and ruby sectors, while promoting greater traceability and ethical standards across the wider gemstone industry.
The leadership change comes at a pivotal moment for the Group. In recent months, Gemfields has been contending with a combination of operational and market headwinds, including production constraints, softer market conditions in certain categories, and pressures on cash flow. These challenges have underscored the need for strategic agility and disciplined capital management as the company works to maintain operational resilience and long-term growth.
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