👉 Siderites are a class of minerals that are formed by the transformation of iron-bearing rocks. They are composed primarily of iron and nickel, with small amounts of cobalt and manganese. Siderites are found in both igneous and metamorphic rock formations, including igneous and sedimentary rocks. In general, siderites are characterized by their red color due to their high concentration of iron oxides. The presence of nickel and cobalt can contribute to the overall reddish hue, while the