Superhard material

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Notion

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Science and technology

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What Wikipedia says

A superhard material is a material with a hardness value exceeding 40 gigapascals (GPa) when measured by the Vickers hardness test. They are virtually incompressible solids with high electron density and high bond covalency.

Excerpt from the Wikipedia article “Superhard material”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: MST, Public domain, via Wikimedia Commons.