Sterling and aquamarine ring is size 5.5 - great for a pinky ring or for a petite finger. Gemstone weighs .50 and is a natural, not treated aquamarine, refractive index authenticated. Band is .925 (sterling) silver with a frosted/shiny polish. Classy and elegant! Aquamarine is a birthstone for March (Pisces) and is thought to be the most popular beryl. Other beryls are emerald and morganite. Good cut and clarity on the gemstone. The color is a pale blue.