This Art Deco ring is set with a rose cut diamond (antique diamond cut) in the center and surrounded by 12 diamonds also in rose cut. The ring is entirely made of platinum. EPOCA AND ORIGIN: The ring was made in France in the 1910s-30s. DETAILS : The central diamond is of good quality, very white. It is not perfectly round, which is often the case for antique rose cut diamonds. I estimate its color F-G and its quality Si. Its weight is approximately 0.40-0.45 carat. The surrounding diamonds…