Topaz is a silicate mineral of fluorine and aluminium. It appears in many colours including yellow, gray, red and colourless – and very rarely, pale blue or pink. Due to its rarity in nature, blue topaz in most commonly obtained by heating and irradiation of colourless topaz. Blue topaz promotes harmony and relaxation and can be especially helpful in healing hurt feelings and calming frayed nerves. In the past, topaz has been used to soothe fears and protect against nightmares to give a restful and serene night's sleep.