A seventh center, sahasrara, is described, but it is not considered a chakra. This is due not only to the wholeness of the energy that it represents, but also because it is considered to be “the seat of Shiva,” and “the abode of Supreme Consciousness”—it expresses not only immanent energy, but also transcendence.
The Sahasrara is described as a lotus flower with 1,000 petals of different colors.
Sahasrara (crown chakra) is generally considered the seventh primary chakra, according to most tantric yoga traditions.