Specimens of galena with chalcopyrite from Chipping Sodbury Mine, Gloucestershire, UK. Chalcopyrite is a well known copper iron sulphide mineral and also a major copper ore, it has a brassy yellow colour and a metallic lustre, however, overtime, this lustre can dulls as oxidation takes place. This mineral, like many other ore minerals forms through volcanogenic processes often being deposited as sulfide ore deposits, as such it can often be found in ore veins, although it can form by other processes too.Galena is a lead sulphide mineral which is a popular mineral among many, from amateurs to professionals and for varying reasons. Galena is the primary ore of lead, and as such, has had a large impact historically on human history. In general, galena is a bright blue mineral and has a metallic (shiny) lustre and is often reflective, but can dull over time with exposure. Specimens are ideal for collectors of British minerals, supplied in a white card tray with an information label.