gold ring with emerald and diamond

An 18 carat yellow gold navette shaped ring fully set with old cut diamonds (0.02 x 28 = 0.56 carat) and in the middle a square cut emerald (app. 0.45 carat), end 19th century.

weight: 3.46 g
ring size: 15 mm / 4 US
width: 19.5 – 2.5 mm