Harry Potter Sterling Silver Glasses and Lightning Bolt Clip on Charm Harry Potter Sterling Silver Lightning Bolt and Glasses Clip on Charm. This charm is made from Sterling Silver with a gold-plated lightning bolt and can be attached to a link bracelet. This charm is an iconic design for any Harry Potter fan. The charm has been created using the style guide from Warner Bros and comes in an Harry Potter branded box which shows the Warner Bros logo. There is a matching necklace, earrings and ring in this collection. The Carat Shop are the licensed manufacturers of Harry Potter Jewellery on behalf of Warner Bros.