Enamel and diamonds gold ring - USA, 1950s

18k yellow gold shaped as a gourd, embellished with twenty-one pavé set diamonds and surrounded by blue and green enamels. Round shaped brilliant cut diamond, G-H color, VVS-VS clarity, weighing 0.90 ct. Hallmarked "18K".
Diameter 2.2 mm. Weight 18.7 g.
IT ring size 16 - US ring size 7.5.
Item condition grading: **** good.