Three physical properties of magnetite include its metallic luster, strong magnetic properties, and hardness of 6-6.5 on the Mohs scale. Magnetite is a black, opaque mineral with a metallic luster, and magnetic particles that can be attracted by a magnet. It is also a relatively hard mineral, with a hardness of 6-6.5 on the Mohs scale. The color of magnetite is usually black, but it can also range from gray, brown, yellow, pink, to green.