The triskelion is an ancient symbol with wide and varied meanings. Derek has a triskelion tattooed on his back. Talia Hale used a cheap metal disk imprinted with a triskelion to help each of her children learn to control their shifts during the full moon. The silver-plated zinc alloy pendant measures 3.5 cm by 3.5 cm. The black cord chain measures 20 inches.