Diamonds And Luxury

Some minerals, such as magnetite, are magnetic and respond to the influence of a magnet, being attracted by it. Magnetite has a black metallic lustre, and a certain titaniferous variety, namely iserine, takes when polished a very brilliant lustre like princess diamond earrings, and is sometimes used for ornamental purposes. The magnetic character of magnetite distinguishes it from other black stones, all of which are either non-magnetic or very feebly influenced by a magnet.