Canfieldite is a rare mineral that was first discovered in 1946. It is a lead-tin-silver sulfide mineral that is most commonly found in hydrothermal veins associated with other metallic minerals. Some possible synonyms for canfieldite include lead-tin-silver sulfide, silver selenide, and tin sulfide. Other minerals that may be associated with canfieldite include galena, sphalerite, chalcopyrite, and pyrite. While canfieldite is not widely known outside of the scientific community, it is an important mineral for researchers and mineral collectors alike due to its unique composition and rarity.