Zinnwald Lithium Plc announced the publication of a further update to its independent Mineral Resource Estimate ("MRE") for its 100% owned Zinnwald lithium project ("Zinnwald" or the "Project") located in Saxony, eastern Germany. A previous update to the Project's MRE, published on 21 February 2024, indicated that it was the second large hard-rock resource in the European Union ("EU"). Following this, a geometallurgical testwork programme was undertaken to provide a higher level of confidence in the Mineral Resource within the mineralised albite granite, which surrounds the lenses of higher grade greisen mineralisation.

June 2024 MRE Highlights: Additional 25.0Mt @ 2,090ppm Li (52kt contained lithium metal) in the Measured category representing an increase of 221% in tonnes and 133% in contained metal in the Measured category compared with the February 2024 MRE. The Project's previous update to its MRE, announced on 21 February 2024, showed it was the second largest hard-rock resource in the EU. The Company undertook a further geometallurgical testwork program to provide a higher level of confident in the Mineral Resource within the broader mineralisation zone.

This has resulted in an additional 25.0Mt being included in the Measured category. The Project now has sufficient material in Measured category alone to support over 20 years of production. This is a major milestone as it further de-risks the resource and adds a higher level of confidence in The detailed mine plan, which is key to financing plans.

This June 2024 MRE update does not incorporate any new drilling or sampling data, and as such, the block model estimate is unchanged. The February 2024 MRE incorporated 26,911m of new diamond core drilling across 84 drill holes completed since the previous MRE released in September 2018. The corresponding drill hole database now consists of 33,933m of drill core and 19,537 samples with lithium analyses since the Project started in 2011.

In addition to the high-grade greisen mineralisation, the focus of the recent 2022 /2023 drilling was the lithium mineralisation hosted by the mineralised albite granite., as well as the internal lenses of higher grade greisen (termed the mineralised zone). The inclusion of the mineralised zone allows for a higher production rate and a potential optimisation of overall project economics.