Sintered or Calcined Bauxite

Abrasives made from bauxite, a clay – like ore of hydrated aluminium oxide, are often used as alternatives to aluminium oxide because they are cheaper. The abrasive is produced by heat-treating natural bauxite without melting and fusing it (as in the manufacture of aluminium oxide). Sintered bauxite shot is used extensively in memorial masonry trade for lettering gravestones. Calcined bauxite, which is available as a grit, is used in most low-tech applications where aluminium oxide is used.