The bija mantras of the chakras are chanted with a focus on the chakra nucleus. Each mantra represents one tattwa, or the inherent element, of the chakra. The five tattwas: earth, water, fire, air and ether each has an individual frequency, density, vibration and colour. The sound wave of each particular element is the bija mantra. Utilising these mantras purifies the chakras and begins to promote the movement of energy within them.