Argentiferous galena is a mineral that is composed of lead sulfide (PbS) and silver sulfide (Ag2S). It is a metallic silver-colored mineral that is very dense and has a Mohs hardness of 2.5. Argentiferous galena is an ore of lead and silver, and it is the most common silver mineral. It is found in many parts of the world, including the United States, Canada, Mexico, Peru, and Chile.