Mr. David Hottman reports

ORESTONE EXPANDS FRANCISCA GOLD - SILVER PROJECT TO NINE SQUARE KILOMETRES IN SALTA ARGENTINA

Orestone Mining Corp. has added an additional approximately two square kilometres of land contiguous with the company's optioned Francisca property located in Salta province, northwestern Argentina, approximately 80 kilometres northwest of the city of Salta. Pursuant to the company's option agreement as previously announced on Feb. 11, 2025, the company can acquire up to an 85-per-cent interest in the Francisca property for cash payments and exploration expenditures totalling $4.2-million (U.S.) over seven years. The company has entered into an amending agreement with the Argentine vendors, whereby the additional land will be included as part of the Francisca property under the option agreement in exchange for $10,300 (U.S.) payable to the vendors (paid).

David Hottman, Orestone's chief executive officer, stated: "The Francisca property covers a robust gold system discovered during a period of historically very low gold prices and no meaningful exploration has been conducted for the last 20 years. With the expansion of the land package complete, Orestone plans to conduct a program of detailed mapping and trench resampling followed by drilling to test the gold system. Our goal is to define an oxide gold deposit that can be mined by open pit. Additional information regarding exploration plans will be released in the near future."

Oxide gold stockwork mineralized trend

Geologic mapping has outlined an oxide gold stockwork mineralized trend over a northwest strike length of 1,100 metres outcropping on the crest of a moderate relief hill. Two zones (North and South) are surrounded by a 500-to-1,000-metre-wide area of strongly hornfels altered sediments and underlain by a large IP (induced polarization) chargeability anomaly, indicating potential for a larger intrusive body at depth. The oxide gold quartz limonite stockwork trend is associated with quartz feldspar porphyry intrusive dikes and intense sericite alteration along northwest-trending faults.

Expanding coverage of the larger target

The new lands are contiguous to the northern and eastern boundaries of the Francisca property and more fully cover the potential extension of the mineralizing system to the east (west previously covered). Approximately 900 metres to the east of the trend hosting the North-South zones, geologic mapping and sampling in an area of historic shallow mine workings have outlined mineralization measuring approximately 400 metres by 200 metres of partially hornfels altered sedimentary rocks. Gold mineralization occurs in quartz veins and veinlets with argillic-chlorite and quartz sericite alteration from three to five metres wide on the margins of veins from a centimetre up to two metres wide. The presence of this style of mineralization fits with a model of distal precious metal mineralization related to a larger intrusive body at depth below the North-South zones.

Previous sampling

The South zone outcrops over an area of 50 to 100 metres wide with a strike length of 500 metres and is the most prominent target outlined to date. A confirmation sampling program, consisting of 20 rock-chip samples taken over lengths varying from 0.1 metre to five metres, was completed earlier in the year, as announced March 27, 2025. The assay values confirm the high-grade nature of the target ranging in value from 0.03 to 33 grams per tonne gold and 2.0 to 160 g/t silver, averaging 5.78 g/t gold and 29.2 g/t silver (gold grades cut to 10 g/t and silver grades cut to 60 g/t). Eleven samples were greater than 6.0 g/t gold and eight samples assayed between 0.36 and 4.5 g/t gold.

Sampling consisted of individual to contiguous chip and chip channel samples depending on the exposure. Samples were transported under chain of custody to the Alex Stewart International Argentina SA, an internationally recognized 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 multielement analysis, including silver. Duplicate samples were analyzed for quality control as well as the standard quality assurance/quality control internal controls used by Alex Stewert International Argentina.

Future exploration

Orestone has designed a two-phase program of detailed, mapping, sampling and drilling in the high-grade South zone. Phase 1 will consist of detailed mapping and sampling with approximately 580 rock-chip samples in the 11 existing trenches that crosscut the zone along its 500-metre-long strike length. The phase II work is planned to be a 1,200-metre reverse circulation drill program consisting of eight reverse circulation drill holes to a depth of 150 metres designed to crosscut the presently defined mineralized zone on a spacing of 40 to 80 metres.

Gary Nordin, PGeo, 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.

Las Burras property

Having conducted no work on the Las Burras-Incahuasi copper porphyry property, Orestone has terminated its option to earn an interest.

About Orestone Mining Corp.

Orestone is a Canadian-based company with an internationally experienced management team. The board of directors and the 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. Orestone's near-term objective on the Francisca property, located in Salta, Argentina, is to define an oxide gold deposit minable by open-pit methods. The company's 100-per-cent-owned Captain gold-copper project, located in British Columbia, hosts a large gold-dominant porphyry system that is permitted and drill ready. The projects are road accessible and suitable for exploration year-round.

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