Antique "Cushion Modified Brilliant" Diamond, Platinum RingAn exceptional ring from the early Art Deco era, featuring a central Cushion Modified Brilliant diamond, resplendent with voluptuous crown angles and faceting, hand cut in the late 19th century, weighing 4. 34 cts., embraced by thirty two single Old European cut diamonds, forming an original antique halo, as a further example of historical craftsmanship, descending lines of eight single Old European cut diamonds and delicate hand engraved designs