Well here is an interesting fact which can make for a lovely ring design.

Pure white diamonds are a lot more expensive than the yellower stones. If we looked at a diamond with a colour grading of "D" which is pure white, and one with a colour grading "M" the stone colour will be slightly yellow. The price difference is huge, the "M" stone is half that of the "D"

If we set the yellow stone in white gold or platinum with a few small white stones surrounding the bigger yellow stone it  looks absolutley fabulous the reflection of the lighter metal make the diamond look a bit lighter but with a contrast that looks good.