Pink diamonds are the rarest diamonds on the market, which makes them extremely valuable. Fancy pink diamonds typically contain some of the following hues: very light pink, light pink, fancy light pink, fancy pink, fancy intense pink, fancy vivid pink, fancy deep pink. Besides their extreme rarity, the allure of argyle diamonds is their mystery. No one understands exactly how pink diamonds get their distinct color. Some scientists speculate that an atomic-level anomaly absorbs light and produces the pink hue.