Rome Resources Plc (AIM:RMR), the critical minerals explorer focused on the Democratic Republic of Congo, has reported wider zones of tin mineralisation from its latest drilling at the Kalayi deposit.
The company said the final assay results would feed into an updated resource estimate for Kalayi, targeted for July.
Rome said the campaign returned broader mineralised zones than earlier programmes while maintaining high-grade tin intervals within them.
Standout results included 9.5 metres grading 2.05% tin from 60 metres in one hole, which contained a narrower section of 3 metres at 5.66% tin.
Another hole returned 19.5 metres at 0.52% tin, illustrating the wider intercepts the company was targeting.
The length-weighted average grade across all samples above a 0.5% cut-off was 2.41% tin, which Rome said compared favourably with the world's leading tin projects.
The company's current Kalayi resource, published in November 2025, stands at an inferred 330,000 tonnes grading 1.36% tin, for 4,470 tonnes of contained tin.
Rome expects the updated estimate to show a meaningful increase in contained tin, subject to review by consultant MSA Group.
Chief executive Paul Barrett said the results provided a strong foundation for the forthcoming estimate.
The deposit's simple cassiterite mineralogy, cassiterite being the main tin ore mineral, continues to support its potential use as feedstock for the nearby Bisie tin mine operated by Alphamin.
Rome said work was advancing in parallel on a pilot mining project intended to support conversion of its current exploration permit into a full mining licence.
The company has also completed an airborne geophysical survey, with processing under way to help identify further exploration targets across the Bisie North project.
Barrett said fieldwork was also progressing at the New Brunswick critical minerals project in eastern Canada, over which Rome holds an option.
He said the initiatives would advance Kalayi towards development while offering opportunities to enhance shareholder value in the second half of 2026.
Tin is widely used in electronics solder, giving it growing importance as a critical mineral.