Yellow diamonds are diamonds that have an obvious yellow body-colour when viewed in the "face-up" position. The yellow colour is usually caused by small amounts of nitrogen contained within the diamond’s crystal structure.
Yellow diamonds with a rich, pure yellow colour are the world’s most valuable yellow gemstone. 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 colour 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.