Fancy color diamonds are a rare find deep under the earth's crust. Some colors such as red and blue are among the most rare and therefore the most expensive. Increasingly, we see royalty, aristocrats, and celebrities wearing these unique diamonds. Mariah Carey's engagement ring was a Jacob and Co. 17-carat emerald cut diamond worth $2.5 million with a 10-carat pink center stone and 58 pink diamonds and two half moon-cut diamonds surrounding it, while Carrie Underwood had a flawless yellow diamond engagement ring by Johnathan Arndt.read more
