Fancy Intense Yellow Diamonds are probably the most sought after yellows. Their yellow shade is extremely pure and clear which has earned them the nickname / synonym of Canary Diamonds.
Price wise they are 25%-50% more than fancy yellows which places them more expensive than white counterparts. The price for a 1 carat good quality Intense Yellow is currently in the range of $6,500 - $8,000.
Last but definitely not least are fancy vivid yellow diamonds. These gems are extremely rare and shine like very few diamonds do. The GIA doesn't specify degrees within the various intensities. While in fancy the difference between a "good" fancy and a "bad" fancy is negligible, in vivids this difference causes a high deviation in prices and they can range $12,000-$18,000 for an average quality 1 carat vivid yellow diamond. This makes them twice the price of an Intense Yellow and 3 times the price of a Fancy Yellow.
There is a small group / type of vivid yellow diamonds that is valued even more. These are vivid yellow diamonds that come from the Zimmy mine in Africa. Their yellow color is simply astounding and they are priced $20,000-$30,000 per carat.If we compare prices of yellow diamonds with white diamonds then fancy yellow diamonds are in a similar price level to that of white diamonds.