Glass Sri Yantra in silk brocade pouch, pouch lined in orange silk; gray upper border; red ground brocade, blue and orange ties. The Sri Yantra, sometimes termed Shri Chakra, is a form of mystical diagram used in the Shri Vidya school.  It consists of interlocking triangles which represent Shiva and Shakti surrounding the central point, or bindu.  The triangles represent the cosmos and the human body.

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