Trefoil Knot Stud Earrings Pewter Earrings Trefoil knot stud earrings Polished pewter openwork on sterling silver posts with stainless steel scrolls.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: 11.5mm Height: 10.5mm 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.