Bespoke, open back rose cut diamond ring set on an antique, 14k gold flat curb link chain.
Approximately a size 7.25. Diamond in setting is 5mm by 6.4mm and 2.3mm thick. Diamond itself is 5.2mm by 3.5mm. Links are 3.7mm wide by 1.6mm thick. Weight is 3.32 grams.