Argyle diamonds are a rare type of diamond known for their unique colors, particularly pink, red, and blue. They are primarily sourced from the Argyle mine in Australia, which was one of the largest producers of colored diamonds until its closure in 2020. The mine's distinctive geological conditions contributed to the formation of these vibrant stones. These diamonds are highly sought after due to their scarcity and beauty. The color grading of Argyle diamonds is different from traditional diamonds, with a focus on hue, tone, and saturation. Collectors and investors often seek them for their potential value appreciation over time.