Sterling Silver is made from 92.5% silver. The only concern with Sterling is it tends to tarnish with age. It is slightly stronger in half hard form than FULL hard Fine Silver. Fine Silver is 99.9% Silver. It is BEAUTIFUL -- A whiter looking silver compared to Sterling. It also tends not to tarnish the way sterling does... It far more tarnish resistant than Sterling, it fuses beautifully, and has no fire scale with heated. It is a bit softer than sterling, so that needs to be considered when planning a project. Our Silver rings are the highest quality cuts, and are all tumble polished and clean, ready to work with!