RE: Proactive Investors2 Jul 2019 15:23
Re ARahims comments-this for info,
Sulfides are minerals that contain sulfur. These minerals are inorganic compounds, which means that they are formed through geological rather than biological processes. These minerals are commonly found in soils with a higher temperature.
Oxides are those minerals that contain oxide anions, or oxygen, with ice and quartz being the exceptions. They are crystals rich in metallic compounds, with their appearance formed by the processes of the earth.