This specimen of [bauxite](http://webmineral.com/data/Boehmite.shtml) displays the classical oolitic habit of this aluminium ore. Bauxite is not made up of a single mineral, but usually dominated by the mineral boehmite. This paticular specimen is also mildly magnetic, revealing that it has [maghaemite](http://webmineral.com/data/Maghemite.shtml) present.