Art Deco Emerald & Diamond Square Cluster Ring Size:3.5 Single Cut Diamonds - 0

Single Cut Diamonds - 0

and it's finished in exceptionally fine turquoise guilloché enamelling within a white enamel border

while I can't find an exact match

and set over foil in closed back settings to enhance their colour and brightness

These are signed Peltant Limoges (in charming handwritten script) to the reverse

Art Deco Emerald & Diamond Square Cluster Ring Size:3.5 Single Cut Diamonds - 0DATE: Art Deco, c. 1920 A striking Art Deco era cluster ring, the square head set with a central emerald and old cut diamonds. The stones are set in platinum, and the outer edges of the border follow the shapes of the stones. The gallery is open worked allowing light in behind the stones to further enhance the brightness. The band is modelled in 18 karat gold with platinum shoulders, and the piece dates from the 1920s. STONES Approx. 0. 31ct Emerald