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The earliest aluminum oxide sublayers didn’t contain enough aluminum.—Mahesh Nepal, The Conversation, 19 Jan. 2026 Using a Whetstone Whetstones (also known as sharpening stones) are flat blocks of abrasive material made from aluminum oxide, ceramics, steel sheets coated with diamond particles, or natural stone.—Randi Gollin, Martha Stewart, 15 Jan. 2026 There are also aluminum oxide crystals to gently polish the skin’s surface.—Kiana Murden, Vogue, 12 Dec. 2025 SmaraQ addresses this issue by developing ultraviolet (UV) waveguides and photonic components composed of aluminum nitride (AlN) and aluminum oxide (Al₂O₃).—Kaif Shaikh, Interesting Engineering, 10 Nov. 2025 See All Example Sentences for aluminum oxide