Molaoi Inferred Germanium Estimate Underway

The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the UK Market Abuse Regulation

29 September 2026

Rockfire Resources plc

("Rockfire" or the "Company")

Molaoi Inferred Germanium Estimate Underway

Rockfire Resources plc (LON: ROCK), the base metal, critical mineral and precious metal exploration company, is pleased to provide the market with this drilling and operational update from Rockfire’s 100%-owned Molaoi zinc deposit in Greece. 

Highlights

• A maiden JORC Inferred germanium mineral resource estimation has commenced. GeoRes Mining Consultants has started a maiden Inferred germanium resource estimate, which will include an updated Inferred zinc resource. To track the germanium resource progression, the company has elected to commence the estimation early. It is expected that the resource numbers will be announced within the next four weeks.

• On completion of its maiden germanium resource, Rockfire expects Molaoi to be one of only two deposits in the world, excluding China, with a quoted germanium resource. The other deposit is Fireweed Metals’ Macmillan Pass in Canada (Indicated 10.98 g/t Ge; Inferred 8.14 g/t Ge)

• Diamond drilling to upgrade the mineral resource from Inferred to Indicated continues, with hole HMO-022 in progress.

• Hand-held pXRF readings of core from hole HMO-022 include a 1cm wide vein of massive copper with readings of 12% Cu. Although extremely narrow, this is the highest copper value ever recorded at Molaoi and will contribute to vectoring towards the source of mineralisation. In accordance with geological models, copper values are expected to increase as drilling approaches the source of the mineralisation.

​

A 1cm wide vein of massive copper (chalcopyrite) at 179.80m depth, with a single pXRF reading of 12% Cu will provide directional information towards the source of mineralisation at Molaoi.

The cleanliness of the pXRF machine was established by measuring a BLANK reference material (a translucent quartz crystal) at the beginning of each day. A Certified Reference Material (CRM) specific to volcanic-hosted massive sulphide Zn-Pb-Cu-Ag-Au ore (OREAS 620) was measured for accuracy/precision of the pXRF machine with a reading taken at the beginning of each day. pXRF readings are preliminary and indicative only, and are not a substitute for laboratory assays. Laboratory analysis will be undertaken in due course. 

Drill hole location map within the Molaoi Licence.

David Price, Chief Executive Officer of Rockfire, commented:

“It is both exciting and significant to have the highly anticipated maiden germanium resource for Molaoi underway. The process involves a re-modelling of the main zinc lodes with the inclusion of germanium grades. Germanium grades are being collated from re-sampling historical core, the ongoing systematic analytical work being done during past and current drilling programmes and extrapolation of grades from regression mapping of historical zinc grades.

On the announcement of the germanium inferred resource, Molaoi will host only the second quoted germanium resource globally, excluding China, demonstrating the significance of the Molaoi project to global germanium supply chains. With reverse parking sensors in cars, artificial intelligence and precision weaponry dependent on germanium supply, Rockfire anticipates increasing demand for germanium over the coming decades. 

The intersection of the highest copper value ever recorded at Molaoi is exciting. In most mineral systems of this type, it is expected that copper values will increase as the proximity to the mineralising heat source approaches. We believe that the narrow intercept is of no concern as the important aspect of this interval is the extremely high grade. This shows the temperature/acidity/pressure conditions are favourable for precipitation of copper. This is a distinct change from other parts of the deposit.

The market will continue to be informed and updated as we advance the Molaoi Project.”

ENDS

For further information on the Company, please visit www.rockfireresources.com or contact the following:

Qualified Person Statement

The technical information in this announcement is based on information compiled by Mr David Price, the Chief Executive Officer of Rockfire Resources plc, who is a Fellow of the Australasian Institute of Mining and Metallurgy (F.AusIMM). Mr Price has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which has been undertaken to qualify as a "Qualified Person" in accordance with the AIM Rules Guidance Note for Mining and Oil & Gas Companies. Mr Price consents to the inclusion in the announcement of the matters based on their information in the form and context in which it appears.

Glossary

Notes to Editors

Rockfire Resources plc (LON: ROCK) is a gold, base metal and critical mineral exploration company, with a high-grade zinc/lead/silver/germanium deposit in Greece and a portfolio of gold/copper/silver projects in Queensland Australia.

• The Molaoi deposit in Greece has a JORC Inferred Mineral Resource of 15.0 million tonnes @ 7.26% Zn, 1.75% Pb and 39.50g/t Ag, for 1.5 million tonnes of ZnEq. metal. This resource uses a 4% low-grade cut, and equates to 1.09 million tonnes of zinc, 260,000 tonnes of lead and 19.1 million ounces of silver. Molaoi is also reported under the UNFC Code with classification E2, F2.1, G3 for Zn, Ag, and Pb, and E3.2, F3.1, G4.1 for Ge. 

• The Plateau deposit in Queensland has a JORC Inferred Resource of 131,000 ounces of gold and 800,000 ounces of silver, using a 0.5g/t Au cut off. 53,000 of these ounces lie within the top 100m from surface. Plateau is subject to a farm-in by ASX-listed Sunshine Metals Ltd (ASX:SHN).

• The Marengo prospect in Queensland hosts high-grade gold, silver and copper within an historic goldfield, which is entirely under licence by Rockfire. Marengo is subject to a farm-in by ASX-listed Eastern Resources Ltd (ASX:EFE).