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
Paraiba Tourmalines Deposit Discovered In Ethiopia
SSEF Said Trace-Element Data From The Suspected Ethiopian Material Overlaps Considerably With Stones From Established Localities, Particularly Brazil
The Swiss Gemmological Institute (SSEF) has received credible reports indicating the discovery of a new deposit of copper-bearing tourmalines, known in the trade as Paraíba tourmalines, in Ethiopia.
The development coincides with the submission of several stones whose geographic origin proved difficult to determine using existing methods. Preliminary analyses suggest some may originate from Ethiopia.
Since their discovery in Brazil in the late 1980s, Paraíba tourmalines have been prized for their vivid “neon” blue and bluish-green colours caused by copper within their crystal structure. Additional deposits were later found in Nigeria and Mozambique, with the latter becoming a major source.
SSEF said trace-element data from the suspected Ethiopian material overlaps considerably with stones from established localities, particularly Brazil, making origin determination challenging. The institute is conducting further research to characterise the new material and refine methods for distinguishing it from copper-bearing tourmalines from other sources.
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