There are more than afew types of rings in the jewelry section. This means there are multiple markets for anyone wanting to know about jewelry sales or market trends. Useful if you want to opena jewelry business. You have promise rings, quite strong sales between young adults and teens. There are friendship rings which can also be classified as a strat of promise rings. Engagement rings, wedding rings, signet rings and eternity rings also exist. It seems theres an enduring life cycle for rings. You go from an engagement ring then you graduate to a wedding ring. Some years later you progess to an eternity ring.