Silver occurs in nature in its native form (a rare mineral consisting mainly of metallic silver), along with sulfur, arsenic, antimony and chlorine.

An excerpt from the article 24 facts about silver

It is also found in the ores: argentite (a rare mineral from the sulfide group), chlorargyrite (a very rare mineral from the halide group), and pyrargyrite (a mineral from the sulfur-salt group, very rare). The main sources of silver are copper, copper-nickel, gold, lead, and lead-zinc ores.