Cubanite is a rare mineral composed of copper, iron, and sulfur, with the chemical formula CuFe2S3. It typically forms in hydrothermal environments and is often found in association with other sulfide minerals. Its color ranges from bronze to yellowish-brown, and it has a metallic luster, making it visually distinctive. This mineral is primarily located in Cuba, where it was first discovered, but it can also be found in other regions with similar geological conditions. Cubanite is of interest to mineral collectors and geologists due to its unique properties and formation processes.