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What is the Hardest Oxide?

In: Jokes and Riddles

Stishovite has a KH of 33 The fourth hardest known substance. It is a highpressure modifacation of SIO 2 and can be formed by astroid and meteorite impacts. KY stands for Knoop Hardnees and based on how deep a diamond stylus can cut into a substane under a given preesure.

First answer by Homievictor9. Last edit by Homievictor9. Contributor trust: 18 [recommend contributor]. Question popularity: 13 [recommend question]

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