Highlights Include

Trench T8 - 23.47 metres of 4.71 g/t gold and 28.54 g/t silver

Including - 6.26 metres of 12.31 g/t gold and 92.40 g/t silver

Vancouver, British Columbia--(Newsfile Corp. - May 7, 2026) - Orestone Mining Corp. (TSXV: ORS) (OTC Pink: ORESF) (FSE: O2R2) (the "Company") is pleased to announce the initial assay results received from the Phase I exploration program on the Francisca Gold Project in Salta Province, Argentina. This program included the resampling of existing trenches for which the Company only possessed historic summary data.

At the South Gold zone, mapping indicates a stockwork width from 40-70 metres averaging 50 metres along a 400-500 metre strike length. The zone consists of highly sericite argillic altered porphyry and hornfels host rocks cut by a dense stockwork of thin light brown limonite veinlets with thin dark quartz vein centres and thicker dark limonite quartz veins that are both vertical and shallow dipping.

Previously excavated trenches were renumbered, cleaned of debris and chip or continuous chip channel samples were taken. Trench T7 was sampled over a length of 72.31 metres with two well mineralized intervals encountered; 36.97 metres grading 0.78 g/t gold with 7.20 g/t silver and 11.72 metres grading 0.58 g/t gold with 4.80 g/t silver, these intervals are separated by a low-grade mineralized interval of 9.40 metres. Trench T8 was sampled over a length of 83.93 metres with two well mineralized intervals encountered; 23.47 metres grading 4.71 g/t gold with 28.54 g/t silver and 11.72 metres grading 1.95 g/t gold with 12.11 g/t silver; separated by a low-grade mineralized interval of 13.18 metres. Assay results for the first two trenches at Francisca compare favorably to historically reported data and confirm that a robust gold-silver mineralized stockwork system is exposed on the surface.

Cut threshold - high gold values cut to 4.0 g/t - high silver values cut to 88.0 g/t

David Hottman, Orestone's CEO, stated: "These initial gold and silver results from Francisca are very encouraging and demonstrate that a robust gold system is present and exposed on the surface. Results from the recent exploration program are being compiled in preparation for Phase I drilling program to test this large gold target. Our goal is to define a gold-silver deposit that can be mined by open pit."

OXIDE GOLD STOCK-WORK MINERALIZED TREND
Geologic mapping has outlined an oxide gold stock-work mineralized trend over a northwest strike length of 1100 metres outcropping on the crest of a hill with moderate relief. Two zones (North and South) are surrounded by a 500 to 1000 metre wide area of strongly hornfels altered sediments with the South zone underlain by a 400x500 metre circular IP changeability anomaly indicating the potential for a larger mineralized intrusive body at depth. The oxide gold quartz limonite stock-work trend is associated with quartz feldspar porphyry intrusive dykes and intense sericite alteration along NW trending faults.

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Samples consisted of individual to contiguous rock chip and chip channel samples varying from 1 to 3 metres in length depending on the exposure. Standards, duplicates and blank samples were then inserted averaging 14% of the total samples taken. The samples were then transported under chain of custody to the Alex Stewart International Argentina S.A., analytical facility located in Palpala, Jujuy Province, Argentina. Samples varied in weight from 1.77 to 3.38 kilograms, and were analyzed by fire assay for gold and ICP for 39 multi-element analysis including silver. Duplicate, blank and standard samples were analyzed for quality control, as well as the standard QA/QC internal controls used by Alex Stewart International Argentina S.A.

Gary Nordin, P.Geo, a Director of the Company, is a Qualified Person as defined by National Instrument 43-101. Mr. Nordin has reviewed and approved the technical information in this press release.

About Orestone
Orestone Mining Corp. is a well-funded, Canadian based company with an internationally experienced management team. The Board of Directors and management team have experience in all aspects of the mining business having been involved in numerous corporate and project level successes. Orestone's property portfolio includes exposure to gold, silver and copper on projects located in Canada and Argentina. Our near-term objective on the Francisca Gold Project, located in Salta, Argentina is to define an oxide gold deposit mineable by open pit methods. The Company's 100 percent owned Captain Gold-Copper Project, located in British Columbia, Canada hosts a large gold dominant porphyry system that is permitted for 79 drill locations. Both projects are road accessible and suitable for exploration year-round.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. This news release has been prepared by management and no regulatory authority has approved or disapproved the information contained herein.

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