A class of calcium-poor achondrite meteorite; also known as enstatite achondrites. Aubrites consist almost entirely of the silicate mineral enstatite. They resemble the enstatite chondrites, to which they are probably related. Aubrites have large grain sizes (sometimes exceeding several centimetres), which suggests that they formed within cooling magmas; alternatively, they may have originated through processes occurring in the solar nebula. Almost all known aubrites are breccias. They are named after a meteorite that fell at Aubres, France, on 1836 September 14.