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

June 4,, 2026

Orestone Mining Corp. (TSX Venture Exchange Symbol: 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.