Pentagon Knot Pendant by St Justin of Penzance £16.50 New stock arriving soon. Pentagon knot pendant A pewter openwork pentagon knot with a central Opalised glass stone. On an 18″ rhodium-plated trace chain. The Celts used knotwork to decorate many of their artifacts. To them, the intricate patterns woven into spirals and knots symbolised the continuity of life. Diameter: 37mmChain length: 45cm (18 inch) Supplied in a satin and velvet-lined gift box. The venerable alloy of pewter is made of 92% tin, with copper and antimony to harden it and enhance casting. All of our St Justin Pewter products are LEAD FREE.Component information - trace chain - Rhodium plated Brass.