A pink-orange type of this mineral is known as padparadscha (POD-par-ODD-shuh).
The "brown" type of this mineral is used as an abrasive and produced by melting and then reducing bauxite. This mineral can be artificially created by crystallizing droplets of this substance into a boule in a flame-fusion process invented by Auguste Verneuil. A pink-orange type of this mineral is known as padparadscha (POD-par-ODD-shuh). This mineral is found as the dominant component alongside iron oxides in the rock emery. Although the pure form of this mineral is transparent, the presence of chromium in it can give it a deep red tint. This mineral, which is made of aluminum oxide, has a Mohs hardness of 9. For 10 points, name this mineral that is found in sapphires and rubies.
The "brown" type of this mineral is used as an abrasive and produced by melting and then reducing bauxite.
corundum [prompt on alumina or Al2O3; prompt on aluminum oxide until read; prompt on rubies or sapphires until read]