What Makes a Blue Diamond Blue?

A blue diamond is a real, natural diamond with a noticeable blue tone due to the presence of boron in the diamond’s carbon structure. Blue diamond’s range in color from light blue to deep blue often with a secondary hue like violet, gray, or green. Blue diamonds are not treated or enhanced to get their color as they are found below the earth’s surface with their natural blue coloring.

Blue diamonds are found only in a few mines in the world: the Cullinan mine in South Africa, the Argyle Mine in Australia, and the Golconda mine in India. The carat weight and intensity of blue color dictate how much a blue diamond is worth.

Blue diamonds are rarer and more expensive than every other fancy color diamond—except for red diamonds.

Blue is the color of the sky and sea. It is often associated with depth and stability. It symbolizes trust, loyalty, wisdom, confidence, intelligence, faith, truth, and heaven.

Blue is considered beneficial to the mind and body. It slows human metabolism and produces a calming effect. Blue is strongly associated with tranquility and calmness. In heraldry, blue is used to symbolize piety and sincerity.

Diamonds with a blue hue are said to help protect against misunderstandings and unnecessary fights.

The strength of a diamond’s color is referred to as the color intensity level. Each Fancy diamond has different intensity levels by which it is evaluated.  For blue diamonds, the grading scale includes Faint Blue, Very Light Blue, Light Blue, Fancy Light Blue, Fancy Blue, Fancy Intense Blue, Fancy Vivid Blue, and Fancy Deep Blue. Fancy Dark is also a possibility if a secondary color is present.