Related to the mining of saltpeter, historically significant in certain regions.
El salitrero trabajaba arduamente en la mina, extrayendo el mineral que era tan valioso para la economía local.
The saltpeter worker worked hard in the mine, extracting the mineral that was so valuable to the local economy.
El salitrero trabajaba arduamente en la mina, extrayendo el salitre que era vital para la industria local.
The saltpeter worker toiled hard in the mine, extracting the saltpeter that was vital for the local industry.