Convex Trefoil Knot Pendant Pewter Pendant Convex Trefoil Knot Pendant Polished pewter openwork pendant on tin-plated snake chain. The Celts used knotwork to decorate many of their artifacts. To them, the intricate patterns woven into spirals and knots symbolise the continuity of life. Width: 32mm Height: 34mm | Chain length: 18 inch (45cm) 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. Lifetime Guarantee As with all St Justin products, this item comes with a lifetime guarantee. If there is a fault in the workmanship, we will repair or replace it free of charge. Simple.