The word Chakra derives from the Sanskrit word meaning "wheel" . In yoga or meditation, the term refers wheels of energy through the body. there are 7 main chakras, which align the spine, starting from the base of spine through the crown of your head. Each chakra has its own vibrational frequency depicted through a specific color. These 7 gem stones -amethyst, blue topaz, peridot, yellow topaz, carnelian, garnet, and iolite set in this "tree of life" pendant is a great way to exemplify the energy of life. The pendant measures about 11/4'' across, and the sterling silver box chain is 18".