Sterling silver bauxite small rhombus necklace p1806 this stylish necklace features a rhombus shaped cabochon of highly polished hand carved white bauxite which is framed within a sterling silver setting and presented on a 18 sterling silver chain the necklace has been designed and made within our workshops in derbyshire ashbourne and matching items are available within the collection bauxite is a pure white material which has a highly vitreous lustre when polished predominantly an alum