Blue diamond is available in various shades of blue ranging from delicate blue hue to intensely rich ‘azure’ blue Color. Other fancy colors like the “aquamarine” blue, sapphire blue and grayish blue are also high on demand.
Blue Diamonds exude outstanding phosphorescence and are categorized on the basis of fluorescence, richness of colors and saturation. It is observed that blue diamonds get this distinctive coloration due to the presence of traces of hydrogen, nickel or boron in the stones. According to the Gemological Institute of America, blue diamonds fall under the ‘grayish-blue’ gradation. Whether they are natural or fancy colored synthetic diamonds, blue diamonds command premium prices when compared to other colored diamonds. The pricing depends on coloration, availability, clarity and use. Furthermore, a good Diamond Cut plays an important role to enhance the natural sheen and beauty of these amazing gem stones.
One of the rarest naturally bred diamonds is the blue diamond. The earliest one of this variety was discovered from the Cullinan Mine, located at Pretoria. The famous blue diamond- Heart of Eternity- a vivid blue colored natural diamond weighing 27 carats was first found at this mine! Another well-known blue diamond is the Hope Diamond- a deep blue diamond of 45.52 carat weight which was found originally in India and later, in the 17th century, it was presented to King Louis XIV of France. Presently, the Hope Diamond, also known as the Tavernier Blue, is showcased at the Smithsonian Institute in Washington DC. Another “largest” blue diamond is the “rosy blue” Idol’s Eye of 70 carats which tops the list of the much-celebrated publicly-displayed diamonds of the world!