The rare mineral adelite, is a calcium, magnesium, arsenate with chemical formula CaMgAsO4OH.

It forms a solid solution series with the vanadium-bearing mineral gottlobite.

It has a Mohs hardness rating of 5 and a specific gravity of 3.73 to 3.79.

Adelite has been found in ore deposits in Algeria, Germany, Italy, Sweden and the US.

This article about a specific mineral or mineraloid is a stub.