Egyptian blue

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

Egyptian blue, also known as calcium copper silicate, calcium copper tetrasilicate, or cuprorivaite, is a pigment with the chemical formula CaCuSi4O10 that was used in ancient Egypt for thousands of years. It is considered to be the first synthetic pigment.

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

Image: FK1954, Public domain, via Wikimedia Commons.