Oscar Heyman diamond and emerald ring.
This platinum ring is made by the world famous firm of Oscar Heyman & Bros. Signed and numbered, it possesses 13 diamonds weighing 1.05 cts and 12 Colombian emeralds weighing .95 cts. The diamonds are all F/G color (colorless to slightly colorless), and VVS2-VS1 (very very slightly included to the second degree to very slightly included to the first degree). Oscar Heyman became famous in the early 20th Century for their fine workmanship and use of fine stones. Circa 1960