Just like all other fancy colors, a pure purple diamond is very rare. Traditionally a purple diamond is associated with royalty and honor, and only royalty could afford to wear it. Instead of pure purple, they are often found with a mixture of pink, gray or brown. gray or brown, and a secondary color will lower the price. They are often called by their specific hue, such as lavender diamonds, mauve, lilac or plum diamonds. With purple, you might see a diamond described as ‘pinkish, blueish purple’ because of the many variations in tone.
Most of these diamonds come from Argyle Mine in Australia, Siberia and Canada The reason for the purple color is the presence of hydrogen and the ‘plastic deformation’ found in these diamonds which happens when the diamond is getting formed.
One of the most famous purple diamonds is the ‘Royal Purple Heart Diamond’ which is a 7.34-carat diamond believed to be from Russia, graded by GIA as Fancy Vivid and has the distinction of largest purple diamond.
As with all fancy colored diamonds, if you are looking for a specific purple shade or hue, a lab-grown diamond or color-treated natural diamond might be the best choice.

Loose Purple Diamonds