1950s Ring 18k Gold Cocktail Ring Old European Cut DiamondCirca 1950s ring, made of 18k gold, featuring an Old European cut diamond. This bold mid century ring is a true statement piece, built around a substantial 5. 23 carat Old European cut diamond. Graded O P in color with SI1 clarity, the center diamond displays slightly brownish tone. Its high crown and broad facets give the gem a distinctive profile. Made in solid 18k gold, the ring has a dome shape that gives it a strong, architectural presence. The