Two diamond and gem-set rings, one by Chatila

Two diamond and gem-set rings, one by Chatila
The first with closed back reverse-set faceted oval yellow/green quartz to a pavé diamond surround designed as stylised melting snow over a pavé circular sapphire ground, finger size T; the second of buckle design, the pavé brown diamond tapered panel with pink sapphire, sapphire and yellow sapphire flowerhead detail and brilliant-cut diamond loop detail, brown diamonds not tested for natural colour origin, finger size U
The first signed Chatila