J2 Metals samples 1,030 g/t Ag at Sierra Plata; identifies seven veins

Vancouver, British Columbia--(Newsfile Corp. - August 25, 2026) - J2 Metals Inc. (TSXV: JTWO) (OTCQB: JTWOF) (FSE: OO10) (" J2 " or the " Company ") is pleased to provide an update on exploration at its Sierra Plata silver-gold-antimony project (" Sierra Plata " or the " Project "), located in the Taxco district of Guerrero State, Mexico. Since field work began in late May 2026, the Company's crews have completed systematic geological mapping, prospecting and rock sampling across approximately half of the Project area, identifying seven veins, locating 20 historical mine workings, and returning multiple high-grade silver assays that will guide a first-ever trenching program.

Highlights

Best results from the 186 mapping rock samples collected to date include 1,030 g/t Ag (dump sample, El Sabino), 941 g/t Ag over 0.7 m with 1.9% Pb and 4.3% Zn (channel sample on the El Sabino vein trend), 811 g/t Ag over 1.4 m (channel, El Sabino) and 788 g/t Ag with 1.05 g/t Au (channel, El Salto).

Seven veins identified to date, including the San Miguel vein; sampling has highlighted the El Salto and El Sabino veins as new priority areas for follow-up.

Approximately 50% of the Sierra Plata project area now mapped for geology, alteration and structure; silver mineralization is preferentially developed where veins are hosted in tuff and limestone.

20 historical mine workings located to date, including the El Sabino mine with more than 30 m of underground development on two levels.

Trenching program being designed across the El Sabino, San Miguel, El Salto and El Resumidero veins, with trenches planned every 25 to 30 metres along strike; drill permitting is advancing in parallel.

Drill permitting is in process to be able to test key targets in a maiden diamond drill program.

"The first two months of systematic work at Sierra Plata have exceeded our