Mineral Bearing Sulphides
What is a sulphide? Mineral bearing sulphides are a type of ore containing oxygen-free compounds of Sulphur. They are found in sulphide-bearing rock in the ore body deep below the earth's surface. They are rich in minerals, causing them to seem metallic in appearance.
Metal ores that are sulphides include copper, mercury and nickel.
Fun fact: The black tarnish on silverware and jewellery is the result of sulphur compounds being exposed to water. Furthermore, on a larger scale, when sulphide bearing material becomes exposed to water, the run-off becomes toxic to the environment.