Collectors and experts have a particular fancy for these stones not because of their rare occurrence but due to their chemical, physical properties and legend surrounding them. These loose diamonds get their blue color due the presence of boron in them. The percentage of boron content determines the intensity of the blue color. Hence, you can find blue diamonds in light blue, dark blue, deep blue, grayish blue, vivid blue and greenish blue colors. Due to technological advancements, now many synthetic or artificial blue stones are being created and sold. This urges you stay alert and be cautious while purchasing loose diamonds.
Real and blue diamonds are most often purchased to glorify rare stone collections or for creating magnificent jewel designs. They make good investments and heirlooms which can be passed on from one generation to another, with pride. When blue diamonds are exposed to ultra violet light, they exhibit a blue glow that is very unique to them alone. The only exception to this rare phenomenon is the hope diamond which produces a red glow instead of a blue glow. Even after several minutes of ultraviolet light exposure it stays red. Scientists and experts call it as phosphorescence and according to them it is due to the presence of both nitrogen and boron in its physical structure.
Some of the world’s largest, famous and costliest blue diamonds include the Tereschenko, the Hope diamond, the Wittelsbach and the Sultan of Morocco. The Tereschenko is believed to be owned first by one of the richest families of Russia called the Tereschenko family, hence named after them. This pear-shaped blue diamond was later sold to Robert Mouawad, a Lebanese diamond dealer and is now known as the Mouawad Blue. The Hope Diamond with an Indian origin has a long history of misfortunes and legends surrounding it. Now it is kept for public display in U.S.