Pura Vida Stone Heart Signet Ring. Dainty is cute but signet rings are a statement! The new Stone Heart Signet Ring is a simple, stack ready design with a pink or white opal filled heart that's a total show stopper! Brass base with rhodium plating and pink opal stone. Imported.California Residents: WARNING PROP 65: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov.