Yellow diamonds are diamonds that have an obvious yellow bodycolor when viewed in the “face-up” position. The yellow color is usually caused by small amounts of nitrogen contained within the diamond’s crystal structure.

Yellow diamonds with a rich, pure yellow color are the world’s most valuable yellow gemstone [1]. Many people consider them to be the most beautiful yellow gem because of their brightness, fire, and exceptional luster.

Yellow is the second most common fancy color in diamonds, with brown being the most common. Yellow diamonds are found at many diamond deposits throughout the world. They are not unique to a specific geographic area or a specific mine. (geology.com)