Temas Resources Corp. and their partner Erin Ventures Inc. reported the filing of an Independent Technical Report providing the Preliminary Economic Assessment (“PEA”) for the Piskanja boron project located in Serbia on SEDAR, as per the terminology, definitions and guidelines given in the Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") Standards on Mineral Resources and Mineral Reserves (May 2014) as required by NI 43-101 ("The CIM Code"). The CIM Code is an internationally recognized reporting code as defined by the Committee for Mineral Reserves International Reporting Standards.

Reported at a cut-off grade of 12% B2O3, at a minimum mining thickness of 1.2 m, considering reasonable underground mining, processing and selling technical parameters and costs benchmark against similar borate projects and a selling price of USD 700/tonne (boric acid) and USD 500/tonne (colemanite 40% B2O3). All figures are rounded to reflect the relative accuracy of the estimates. Mineral Resources are not Mineral Reserves and do not have a demonstrated economic viability.

The contained B2O3 represents estimated contained metal in the ground and has not been adjusted for metallurgical recovery, and may have discrepancies due to rounding. The PEA was prepared independently by, and under the supervision of, Prof. Miodrag Banješevic PhD. P.Geo, EurGeol, with contributions from Prof. Saša Stojadinovic PhD.

(mining engineer). The PEA was prepared in accordance with the requirements of National Instrument 43-101 and is based on the Mineral Resource Estimate for Piskanja with an effective date of June 24, 2022.