Corundum is a crystalline form of aluminium oxide (Al2O3) typically containing traces of iron, titanium, vanadium, and chromium. [3][4] It is a rock -forming mineral.

What is Corundum? Corundum is a rock-forming mineral that is found in igneous, metamorphic, and sedimentary rocks. It is an aluminum oxide with a chemical composition of Al 2 O 3 and a …

Corundum, naturally occurring aluminum oxide mineral (Al2O3) that is, after diamond, the hardest known natural substance. Its finer varieties are the gemstones sapphire and ruby (qq.v.), and …

Jul 2, 2025 · In this article, we’ll explore what corundum is, its key properties, and the many ways it’s used in everyday life—from jewelry to industrial applications.

Mar 10, 2019 · Corundum is a mineral that is primarily composed of aluminum oxide (Al2O3) and is one of the naturally occurring crystalline forms of aluminum oxide. It is a very hard mineral …

Corundum is used as an abrasive ("Emery"), and the gem varieties of corundum are better-known as Ruby and Sapphire.

Jan 23, 2025 · Discover corundum, the extraordinary mineral that creates rubies and sapphires. Learn its properties, origins, and role in jewelry and technology.

Corundum is a mineral that is commonly found in metamorphic and igneous rocks. It is composed of aluminum oxide and can be identified by its hardness and crystal structure. Corundum has a …

These samples of corundum are displayed in the Smithsonian Museum of Natural History. Corundum is a oxide mineral of aluminum with the composition Al 2 O 3. The sample at left is …

Oct 21, 2024 · Due to natural corundum's popularity and high value, synthetically produced gem corundum has been used as an inexpensive substitute for many years. Corundum is also used …