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Compared to a white diamond which is also colorless, a canary yellow diamond has higher nitrogen composition within its carbon crystal structure that causes the diamond to look yellow. This is its main difference from the usual white "colorless" diamonds.

Yellow diamonds are graded on a scale of D to Z, with D being the most colorless and Z being the most yellow. The color grade is determined by the intensity of the yellow color and the presence of any other colors.

There are many different types of yellow diamonds, each with its own unique color and appearance. Some of the most popular types of yellow diamonds include Fancy Light Yellow, Fancy Yellow, Fancy Intense Yellow, Fancy Vivid Yellow, and Fancy Deep Yellow.

Yes, yellow diamonds are considered relatively rare compared to colorless diamonds. The intensity of the yellow color and the size of the diamond influence its rarity, with deeper and larger yellow diamonds being more uncommon and valuable.

Yellow diamonds are relatively durable, but they still require proper care. To keep them looking their best, clean them regularly with a mild detergent and a soft brush. Store yellow diamond jewelry separately from other pieces to avoid scratches, and have them inspected by a jeweler periodically.