I''''m looking to purchase a vintage canary yellow diamond ring. They date it to 1920, but reading farther into the description it states it has not been clarity enhanced, but may have been color enhanced. Can you tell me approx. what years they started color enhancing so I can accurately date the ring. I have fallen in love with the vintage style ring after receiving a 1920''''s 1/2 carat european mine cut ring. So I''''m looking more to date the ring to be confident it is not a chineese knock-off.
Thank you
Thank you