About Blue Diamonds
How are blue diamonds formed? Like all natural diamonds, blue diamonds are formed throughout billions of years as pressurised carbon under certain temperatures.
Blue diamonds, however, contain an element called Boron. When Boron is present in the crystal carbon structure, it absorbs yellow, red and green light. This creates the blue hue, or rather, blue light reflection. There is another type of blue diamond, often with a greenish blue color, caused by natural irradiation.