Wowzer, this ring rocks! Stamped "Brazil" " 925" and with a maker's mark insignia this very modernist size 6.5 cast sterling ring features a polished shell central cabochon. "Brazil" most probably refers to the maker, and not the country of origin. This ring has great vibes; I wish I could positively id the maker; I have the feeling that it could be the creation of a listed silversmith. In good vintage condition.