Iron oxide, also known as ferric oxide, is widely found in nature, and is used as inexpensive, durable pigments in glazes, paints, and even colored concretes.
It produces various shades of green or brown when used as a glaze colorant, or as a decorative oxide.
This iron oxide is bright red in its natural state.
In its powdered form, iron oxide can cause skin, eye, and respiratory tract irritation and sensitization.
Always use care and wear protective gear when handling this chemical.