When does yellow become orange, and orange become red? The question may sound a bit philosophical until you tie it to colored diamonds, where slight variations in color can mean huge differences in price.

Jewelry connoisseurs have gone crazy for colored diamonds. And their appetites were practically insatiable in 2013.

As the creator of the 4Cs and International Diamond Grading System, GIA also established color grading standards and terminology specifically for colored diamonds, based on the color’s hue, tone, and saturation. Today, we identify some of the defining characteristics that help make fancy-color diamonds a true feast for the eyes.

Rare pink diamonds are once again making eye-catching appearances at prominent jewelry auctions worldwide, and it’s not just a color for Valentines Day gifts.

Blame it on St. Valentine, but February is synonymous with the color red. Giving your special someone a red gemstone jewelry piece would be the ultimate token of affection to mark the upcoming holiday dedicated to romance. When considering purchasing a red gemstone such as ruby, garnet, or red diamond, there are a few key facts and considerations to keep in mind.