What is the colour of ferric oxide?

Answer:

• A greenish to black powder called ferrous oxide is mainly utilized as a glassware colour. It can be made by warming a ferrous compound in the absence of air or by passing hydrogen over ferric oxide. It exists naturally as the nutrient wüstite. Magnetite, a nutrient that contains ferric oxide, is a reddish-brown to black powder that happens.
• Almost any ferrous compound can be ignited in the air to create it synthetically. Various colours, from yellow to a crimson called Venetian red, are made from ferric oxide as their base. The red, fine paste variant, often known as jewellers’ rouge, is used in cosmetics and for cleaning gems and rare minerals.