This beautiful ring is a staple from Tiffany & Co.! This ring features a twisted hook & eye design. The ring itself is made primarily of sterling silver, but the ball detail at the end of the hook is made of 18k yellow gold. The inside of the band is stamped "TIFFANY & CO. 925 750". At its thinnest point, the band measures approximately 2.5mm in width. If you are a lover of unique designer pieces, this Tiffany & Co. ring is a must!