A metal of asilver-white color, found in many minerals. It is got by fusion from magnesium chloride. It is very light, easily tarnished, and when lighted burns with a brilliant glow. It may be drawn into wire, filed, bored, or flattened easily. On burning, magnesium unites with oxygen, and leaves a white powder. This is called magnesia (magnesium oxide), which, when united with sulphuric acid, makes magnesium sulphate. Magnesium sulphate is found in a mineral spring at Epsom in England, and is commonly known as Epsom salts.