👉 Cassiterite is a type of quartz mineral that is often found in rocks and minerals. It is composed primarily of silicon dioxide (SiO2) and has the chemical formula SiO2. Cassiterite can be found in various colors, including white, yellow, red, and blue. The name "cassiterite" comes from its use as a symbol for copper in ancient times, which was used to make tools and weapons. The mineral is also named after the British astronom
