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This formula blends zinc oxide and iron oxide to block UVA and UVB rays, and can even help block out blue light.—Alanna Martine Kilkeary, Glamour, 9 July 2025 Rust, which is a common form of iron oxide found here on Earth, also often has a reddish color.—David Joffe, Space.com, 19 June 2025 Ochre, composed of iron oxide, clay, and silica, is more than just cave-art paint.—New Atlas, 10 May 2025 This naturally occurring pigment is composed of iron oxide, clay, and silica and has been used by several species of hominins for thousands of years.—Laura Baisas, Popular Science, 16 Apr. 2025 See All Example Sentences for iron oxide
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