Pirate skull silver signet ring The signet rings are made to order from sterling silver 925 by hand casting. The human skull and crossbones also called Jolly Roger is a famous Pirate symbol. On sides of the ring is depicted Treasure map with compass. This ring is designet as cool ring for men who likes skull jewelry. Description of Jolly Roger silver ring: Material : Sterling silver solid (92.5% silver, 7.5% copper). The ring is made for order. Average weight (depends on size): +/- 19 gm or 0.68 Pirate Symbols, Pirate Ring, Famous Pirates, Hand Casting, Cool Rings For Men, Cool Ring, Treasure Map, Pirate Skull, Signet Rings