London-based Gemfields is set to expand the variety of rubies available at its upcoming mixed-quality auction in June 2025, introducing a broader selection of secondary-type gemstones. This event will mark the debut of rubies extracted from a recently accessed area of the company’s Mozambican mine—an area that has not yet contributed significantly to previous auctions. Among the notable gems featured will be a ruby weighing 36 carats.

Rubies from this newer section are characterised by a lighter colouration and enhanced fluorescence, a result of their lower iron content. This distinct mineral profile gives buyers a chance to diversify their selections with fresh tones and unique visual properties.

“It is exciting to see the evolving variety of rubies being recovered by Montepuez Ruby Mining. I am particularly eager to see how a single fine-quality ruby weighing 36 carats will perform at our auction,” said Adrian Banks, managing director for product and sales at Gemfields. “I believe this ruby will be strongly contested by discerning clients who recognise the rarity and significance of such a gemstone, given both its size and quality.”

The company conducts its ruby sales through structured auctions, with all proceeds returned to Mozambique. This process has provided buyers with access to a range of qualities suitable for various uses across the supply chain.

Separately, construction is nearing completion on a new ore processing plant at the mine, which is designed to handle 400 tonnes per hour. Once operational, the facility is expected to triple current processing capacity, allowing for greater output from the site.