With fancy color diamonds the rarest, most valuable colors are saturated pinks, blues, and greens. Even very slight color differences can have a big impact on value.
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What To Look For
Compared to fancy yellows and browns, diamonds with a noticeable hint of any other hue are considerably more rare. Grading fancy color diamonds is complex and specialized, and it takes highly trained laboratory graders to complete the process accurately.
Color is the dominant value factor. Even diamonds with numerous inclusions that result in a low clarity grade are prized by connoisseurs if they display attractive face-up color. Of course, inclusions that threaten the gem’s durability can lower a fancy-colored diamond’s value significantly.
Cutters discovered that certain styles—typically mixed cuts like the radiant—can intensify yellow color in diamonds that are toward the lower end of the D-to-Z color-grading scale. When carefully fashioned as radiant cuts, many yellow-tinted stones can become fancy yellows when viewed face up.