Yellow Diamonds Why are diamonds yellow? Nitrogen is the cause of the yellow color in both natural and synthetic yellow diamonds. The Tiffany diamond is the best known yellow diamond, second famous to the blue Hope diamond. The original rough Tiffany diamond weight was 287.42 carats, found in 1878 outside of Kimberly. Tiffany & Company cut the stone in Paris and the final weight is a 128.51 cushion cut diamond. Although there are a few yellow diamonds are larger than the Tiffany diamond has been seen and extremely well known.

An interesting note is the Gemological Institute of America has not officially graded the stone.The main yellow color grades that people in the trade are in fancy light, fancy, fancy intense, and fancy vivid. Fancy deep and fancy dark are highly undesirable as well as the color brown. Modifiers The two most desirable secondary colors with the yellow diamond are orange and green. An orange secondary makes the stone really electric, therefore making it sought after.