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Diamond & Specialty Minerals Summary for Oct. 10, 2025

2025-10-10 17:26 ET - Market Summary

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by Will Purcell

The diamond and specialty minerals stocks box score on Friday was a pleasing 98-75-137 as the TSX Venture Exchange fell 13 points to 980. Well, the good news is that the four consecutive weeks of declines in Paul Zimnisky's global rough diamond price index have ended. Unfortunately, another week has passed since the last time the index mounted a gain.

Yes, Mr. Zimnisky has his index at 124.7 points, the same as a week ago and down just 1.2 per cent over the past six months. Still, it is off 8.6 per cent over the past year and it is a whopping 21.2 per cent below where the index stood a decade ago. (Rough diamond prices are far below their high in early 2022, when the market experienced a temporary shortage as demand increased while miners struggled with the lingering impacts of COVID-19 as they ramped back to full production.)

Mr. Zimnisky also took a stab at predicting diamond prices -- he is the undisputed guru among diamond analysts these days after all. His latest projection shows modest growth in his index by the end of 2029, perhaps reaching 155 points, roughly where it was through most of the mid-2010s, based on his modelled growth in demand.

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