Fancy yellow diamonds are a type of colored diamond known for their vibrant yellow hue. The intensity of the color can vary, with deeper shades often being more valuable. These diamonds are graded based on their color, clarity, cut, and carat weight, similar to traditional white diamonds. The yellow color in these diamonds is primarily due to the presence of nitrogen atoms during their formation. Natural diamonds can be found in various locations, including South Africa and Australia. Fancy yellow diamonds are popular in jewelry, often used in engagement rings and other decorative pieces.