Tin pyrites, also known as stannite, is a mineral composed of copper, iron, tin, and sulfur. It is often found in association with other minerals like cassiterite, sphalerite, and pyrite. There are several synonyms for this mineral, including bell metal ore, tin copper iron sulfide, and tin iron copper sulfide. The mineral is named after the Latin word "stannum," which means tin. Stannite is commonly used as an ore of tin and copper, and it has been mined in various parts of the world, including Bolivia, China, Germany, and Mexico. Its metallic luster and bright colors make it an attractive mineral for collectors.