Gemfields is pleased to announce the results of a mini-auction of Mozambican rough rubies from
Montepuez Ruby Mining (“MRM”) held via online bidding after viewings in Bangkok, Thailand from 29September to 3 October 2025
Gemfields Mini Ruby Auction Highlights
Auction Highlights
Highlights: Mini Mixed-Quality Ruby Auction – September – October 2025
• Auction revenues of USD 11.0 million
• 26 of the 33 lots on offer were sold
• 62% of the 297,449 carats on offer were sold
• Average realised price of USD 59.43 per carat
Adrian Banks’ Comment
Adrian Banks, Gemfields’ Managing Director of Product & Sales, commented: “This mini-auction primarily featured medium and commercial grades of secondary material sourced from a recently developed mining area in the ‘Maninge Nice’ domain and where our processing activities have been concentrated in recent months. We are encouraged by both the results and the strong customer engagement, reflecting growing interest in this new material. Seven lots—mostly representing the smallest size ranges within the same lower-quality grade, and offered for the first time at this auction, remained unsold. As this auction is part of the early market discovery process for new material, we will leverage the market feedback received to refine our future offerings.”
Extraction and Proceeds
The gemstones were extracted in Mozambique by Montepuez Ruby Mining Limitada (“MRM”) which is 75% owned by Gemfields and 25% by Mwiriti Limitada. The proceeds of this auction will be fully repatriated to MRM in Mozambique, with all royalties due to the Government of the Republic of Mozambique being paid on the full sales prices achieved at the auction.
Ruby Auction Schedule Update
Ruby Auction Schedule Update Gemfields has made the decision to defer the usual November/December ruby auction to January/February 2026. This is on account of the previously advised delay in the final commissioning of MRM’s second processing plant at MRM, now exacerbated by illegal miner action. Gemfields Group Limited Page 2 of 3
Plant Commissioning Delay
While final commissioning is presently still expected in October 2025, the new plant’s operation has been materially impacted during the last week by illegal miners, who presently number between 250 and 400 per day, sabotaging the plant supply infrastructure. In addition, the illegally mined rubies leaving the Montepuez region has a detrimental impact on market prices and on Mozambique’s tax receipts from its ruby resources. Gemfields and MRM continue to engage with the appropriate Mozambican governmental authorities.
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