A ring is a round band, usually of metal, worn as ornamental jewellery. ... Rings may be made of almost any hard material: wood, bone, stone, metal, glass, gemstone or plastic. They may be set with gemstones (diamond, ruby, sapphire or emerald) or with other types of stone or glass.10 Different Types of Rings for Women and Men - Diamond Rings. Diamond rings are the classic engagement ring for women. ...Gold Rings. Gold is historically the classic choice for a ring and other jewelry material. ...Class Rings. ...Weddings Bands. ...Moissanite Rings. ...Silver Rings. ...Birthstone Rings. ...Platinum Rings.