08:06 AM EDT, 10/15/2025 (MT Newswires) -- GR Silver Mining ( GRSLF ) Wednesday said it is progressing toward its objectives of its Phase II of the Bulk Sample Test Mining Program (BSTM) at the Plomosas Mine, located in Sinaloa, Mexico.

The company said the underground channel sampling at Plomosas Mine delineated additional high-grade mineralized zones that are accessible for future BSTM. The program also identified previously blasted mineralized material suitable for future processing.

"The confirmation of sulphide-rich, unmined areas that also contain high-grade silver and gold mineralization further supports the company's plans to advance the implementation of the BSTM at Plomosas," said GR Silver Mining ( GRSLF ) chief executive Marcio Fonseca. "The company is also progressing process design criteria that will be the basis of preliminary flowsheet design and initial engineering and costing studies."

"Additional metallurgical test work on representative samples collected from the historic mine are also being completed to corroborate previous test work that showed strong recoveries of silver, gold, lead, and zinc," added Fonseca.

GR Silver Mining ( GRSLF ) plans to continue exploring and evaluating additional high-grade silver zones identified in the MRE, which may further enhance the implementation of the BSTM. It is also reviewing opportunities in the surrounding Plomosas district, including existing processing facilities, for potential integration into the BSTM framework.

The company also appointed Robert Payment, currently serving as chief financial officer, to the additional role of corporate secretary, effective immediately.

Shares of the company closed down 1.7% to $0.295 on Tuesday on the TSX Venture Exchange.