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Blue diamonds are a type of fancy color diamond that are highly prized for their rare and striking color. Blue diamonds get their color from the presence of boron, which is a chemical impurity in the diamond's crystal structure that causes the absorption of certain wavelengths of light, resulting in the blue color. Only around .1% of all diamonds are naturally blue!
Blue diamonds come in a range of shades, from faint blue to deep blue, with the more intense shades being the most valuable. Learn about all the shades and intensities of blue diamonds here.
The World's Most Famous Blue Diamond
Blue diamonds are often the most expensive jewel sold in auction houses such as Sotheby's and Christie's. The most famous blue diamond in the world is the Hope Diamond, which is a deep blue diamond weighing 45.52 carats and is estimated to be worth over $250 million.
Photo Courtesy of the Smithsonian Institution
The Hope Diamond, with a rich history dating back to its purchase by French merchant traveler Jean Baptiste Tavernier in the 17th century, began as a 112 3/16-carat diamond, likely originating from the Kollur mine in India. It was initially rough and triangular in shape and possessed a "beautiful violet" hue. After changing hands, it was recut into a 67 1/8-carat stone, known as the "Blue Diamond of the Crown" or the "French Blue," eventually becoming part of the French Royal Treasury. However, in 1792 it was stolen and in 1812, the diamond reemerged in London and, with strong evidence suggesting it was the same stone, became known as the Hope Diamond.
It passed through various owners, including King George IV of the United Kingdom, and finally found its way to Henry Philip Hope in 1839. After several generations, the diamond ended up with Lord Francis Hope in 1901, who sold it to New York diamond collector Selim Habib. The diamond underwent several transformations, ultimately becoming the iconic Hope Diamond we know today.
In 1958, Harry Winston Inc. donated the Hope Diamond to the Smithsonian Institution, where it remains on display.
Photo Courtesy of the Smithsonian Institution
This famous gem has left the Smithsonian only a few times for exhibitions and cleaning. Its captivating history continues to fascinate gem enthusiasts and the public alike, with a hint of mystery surrounding its origin and vibrant color.
Learn more about the marvel of blue diamonds here!
