Men's Sterling Silver Paua Shell Thunderbird Ring .925This ring is . 925 pure sterling silver with a round paua shell stone. They are a nature made item, so please do not expect to get the one pictured & NO 2 are alike! This ring is available in whole sizes only, 9 through 16. Antiqued ring with intricate stampings, Outstanding value for the money. A very handsome Thunderbird ring! Antiqued sterling upper band with stamped thunderbirds. 7 8 of an inch [top to bottom as shown]. Stone: 11 16 in. x 1 2 in.