Orestone Mining Expands Francisca Gold - Silver Project to Twenty-Three Square Kilometres and Acquires Important Geophysical Survey Data

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Vancouver, British Columbia--(Newsfile Corp. - June 4, 2026) - Orestone Mining Corp. (TSXV: ORS) (OTC Pink: ORESF) (FSE: O2R2) ("Orestone" or the "Company") is pleased to announce the expansion of the Francisca Gold-Silver Project with the acquisition of the Francisca II concession and the purchase of historic geophysical survey data over the current and new land positions. The Francisca Gold-Silver Project now encompasses twenty three (23) square kilometres of mineral concessions located in Salta Province, northwestern Argentina approximately 80 kilometres northwest of the city of Salta. It is accessed by gravel roads off the paved National Highway RTE 51. OXIDE GOLD STOCK-WORK MINERALIZED TREND With the addition of the Francisca II concession the mineralized trend now covers a northwest strike length of 1500 metres where an oxide gold-silver stockwork, vein and breccia system can be observed at surface in numerous large outcropping areas (North cluster, South Zone and Kelly Zone). The outcropping zones are surrounded by a 500 to 1000 metre wide area of strongly hornfels altered sediments, further defined by a 1700 metre long by 500 to 700 meter wide IP chargeability anomaly of 7.9 mV/V that appears to be related to gold-silver mineralization. Several large, strong IP chargeability anomalies measuring up to 20 mV/V indicate the potential for a larger buried gold porphyry. The oxide gold quartz limonite stock-work trend is associated with quartz feldspar porphyry intrusive dykes and intense sericite clay alteration along a NW trending fault system. David Hottman, Orestone's CEO, stated: "The Francisca II concession is a meaningful addition to our land position at Francisca. The mineralized trend taking shape is being derisked through methodical exploration to define drill targets. Results from the initial mapping and sampling program are very encouraging and demonstrate that a robust gold system is present and is partially exposed on the surface, while the recently acquired geophysical data is showing us a potentially much larger system at depth. Results from the recent exploration program are being compiled in preparation for a Phase I drilling program." INDUCED POLARIZATION AND MAGNETIC SURVEYS Orestone has acquired, at minimal cost, results of a time domain Induced Polarization (IP), Resistivity, and Total Field Magnetic surveys carried out on the prop...

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