GR Silver Mining Extends High-Grade Silver at Plomosas, Eyes Resource Boost

NEW YORK, NY – November 19, 2025

Silver Exploration Gains Momentum in Mexico

GR Silver Mining Ltd. has announced promising results from recent step-out drilling at its Plomosas Project in Sinaloa, Mexico, bolstering confidence in the project’s expansion potential. Drill hole SMS25-12 intersected 5.0 meters grading 232 grams per tonne (g/t) of silver, including a high-grade zone of 0.9 meters at 956 g/t. This intercept extends mineralization 75 meters beyond the current resource area, signaling a substantial opportunity for resource growth. The results come at a time of increasing strategic importance for silver, designated a critical mineral by the U.S. Geological Survey and facing growing demand from both industrial and investment sectors.

Expanding the San Marcial Deposit

The San Marcial Area, a key focus of GR Silver's exploration efforts, continues to deliver exceptional results. The recent intercepts build upon a history of high-grade discoveries, with previous drilling highlighting the potential for a large-scale silver system. According to company reports, the San Marcial deposit remains open along strike and at depth, offering significant opportunities for further expansion. The new drilling not only confirms the continuation of high-grade mineralization but also extends the known footprint of the deposit, paving the way for a potentially significant increase in the overall resource estimate. “The team is really encouraged by the continuity of the mineralization we’re seeing,” said one source close to the project. “These results strongly suggest we can significantly expand the current resource base.” Drill hole SMS25-11, which returned 24.6 meters at 29 g/t Ag, further demonstrates the breadth of mineralization and the potential for widespread resource growth.

A Bullish Outlook for Silver and the Plomosas Project

The timing of these discoveries coincides with a strengthening silver market. Analysts predict rising silver prices, driven by increasing demand from sectors like electric vehicles, solar energy, and electronics.