Blue Diamonds

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Every color in the world evokes different emotions, and blue is no different. The color blue has historically symbolized royalty and prestige. It comes as no surprise, then, that some of the biggest diamond auctions throughout history included natural fancy blue diamonds.

Rarity of Blue Diamonds
Blue diamonds are among the rarest diamond colors after red diamonds. Some claim, based on their very high prices, that pink diamonds are more rare than blue, but that is just as much a result of increased demand as it is reduced supply. While Leibish has many pink diamonds to offer but this beautiful 0.32ct flawless radiant was the only pure blue diamond over 0.30ct when I was writing this article.

Blue Diamond Color Intensity Levels
The strength of a diamond’s color is referred to as the color intensity level. Each diamond color has different intensity levels. For blue diamonds, it’s Faint Blue, Very Light Blue, Light Blue, Fancy Light Blue, Fancy Blue, Fancy Deep Blue, and Fancy Vivid Blue. Fancy Dark is a possibility as well if a secondary color is present.

Secondary Hues for Blues
Every color diamond is considered rare, but pure colors (ie, those without a secondary modifier) are even more unique. However, pure colors are hard to obtain, and some color combinations can be exquisite. Gray-blue and green-blue are the most common secondary colors for blue diamonds but there are many possible color combos. This 0.46 fancy gray blue diamond is a perfect example. Even these stones are considered exceptional. See the chart below containing a wide variety of color combinations and intensities.

1st row: Light Blue,F. Light Blue, Fancy Blue, F. Intense Blue, F. Vivid Blue, F. Deep Blue, F.Intense Violetish Blue.

2nd row: F. Light Grey-Blue, Fancy Grey-Blue, F.Dark Grey-Blue, F.Greyish Blue, F.Deep Greyish Blue, F.Light Greenish Blue, F.Intense Greenish Blue.

3rd row: F. Vivid Greenish Blue, Fancy Green- Blue, F. Intense Green-Blue, F. Vivid Green- Blue, F. Deep Green- Blue, Fancy Greyish Greenish Blue. (credit: Leibish.com)

Blue Color Source
The mesmerizing blue color is caused by the presence of boron within the diamond. Many blue diamonds are Type IIb diamonds, which account for only 0.1% of the world’s color diamonds. This makes blue diamonds even more suitable for diamond collectors, investors, and enthusiasts.

Where Blue Diamonds are Found
Originally, blue diamonds were mainly sourced from India, but in recent years, more and more blue diamonds have been produced in South African mines, from the Pretoria mine in particular. Some blues are found in Australia as well, including the Argyle mine.
Comparison Stones
There are some that compare blue diamonds to blue sapphires, although they are quite different from one another. Blue diamonds are harder than sapphires with a 10 ranking on the Moh’s scale versus a 9 ranking.

It is only point less, but this actually has significant implications for how the stone is cut. Most importantly, blue diamonds are far less common than blue sapphires even though top quality blue sapphires can be rare and relatively expensive as well.
Famous Blue Diamonds
One of the most noteworthy blue diamonds is of course the Hope Diamond. Polished into a 45.52-carat diamond from a 112.25-carat stone, the Hope Diamond originated in India before it was sold to King Louis XIV. The famous diamond is not just huge, it displays a stunning Fancy Deep Grayish-Blue color and a VS1 clarity level.

It is estimated to be worth between $200 to $250 million.

The Wittelsbach-Graff Diamond is another famous blue with a Deep Grayish-Blue color, but what sets this stone apart is its unusual pattern of 82 facets. This diamond sold for $24.3 million.
Blue Diamond Prices
As one of the rarest diamond colors available, blue diamonds are expensive to the extreme. Having said that, certain color combinations such as those that lean more to the gray than to the blue can be more affordable.


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