This antique piece was handcrafted during the early Art Deco design period ( 1920-1940 ). The ring features a center diamond measuring approximately 0.50 carats ( one half of one full carat ), grading approximately H in color, I1 in clarity. The setting also features 4 extremely dark custom cut sapphires and many hand engraved details. The setting is 18k white gold and is signed by the antique jewelry designer BELAIS. The Belais design house is most famous for being one of the very first in the world to make white gold jewelry, cutting edge technology for the time period. This ring is currently a size 6.