5 Vintage well made costume jewelry rings for repair and repurpose

Five vintage rings. Various sizes. Four are missing at least one rhinestone and one has had the band cut to remove so would need to be soldered to wear comfortably if desired. The one with a blue centre stone is stamped 18khge for electroplating. These are all well designed to look more valuable so could be repaired and sold or kept to wear daily or to any elegant or formal event. Please see photos for the best description thank you.