Art Deco style ring with ~0.75ct diamond

1 diamond about 0.75ct J/P1, 4 diamond rauts
total weight of diamonds in the product about 0.80ct
product weight: 2.16g, pr. 0.585 gold
creation time: circa 1940
The product is a perfect example of a ring made in Art Deco style, inspired by geometric shapes and high spatial discipline. An old ring made around 1940 with a central diamond of about 0.75ct of very good diameter, making it optically look bigger