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Chemical element
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Beryllium the chemical element with an atomic number of 4; a light metal with specialist industrial applications. Because any beryllium synthesized in stars is short-lived, it is a relatively rare element in both the universe and in the crust of the Earth. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium include beryl (aquamarine, emerald) and chrysoberyl. As a free element it is a steel-gray, strong, lightweight and brittle alkaline earth metal.


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File:NatCopper.jpg This article is part of Project Elements, a All Birds project that aims to write comprehensive articles on each element.