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The Guide For Buyers & Investors


Natural fancy blue diamonds rank near the top for being some of the rarest colored diamonds. To underscore the true extent of the rarity of blue diamonds, to date, they account for less than 0.1 percent of the total diamond yield amassed at the Premier mine in South Africa, which is responsible for producing the greatest amount of blue diamonds for the market. Further emphasizing its rarity, blue diamonds experience an entirely infrequent and inconsistent emergence from the mine in any given year.


Diamond Envy’s team has a combined 40 years’ experience in the industry as GIA Graduate Gemologists, graders, designers, activists and diamond enthusiasts. Our involvement in every step of the mine to market process gives us a superior command for the diamonds themselves, how they are sourced, cut, polished, and set in jewelry.  This approach means that we not only offer the best jewels, but we are able to pass along exquisite, conflict-free diamonds at excellent prices.


We specialize in the rarest colored diamonds, and our team ensures that our collection features only beautiful and valuable stones. Diamond Envy is proud to offer only natural blue diamonds with the best qualities which we’ve shared below in this blue diamond expert resource guide.




Most natural blue diamonds that are mined are identified as type IIb.  Unlike type I diamonds, type II diamonds are not composed of a large amount of nitrogen. Type IIb blue diamonds, in particular, contain a telltale measure of boron that gives these diamonds their distinctive blue color. (To learn more about diamond types, visit the GIA.) The greater the amount of boron in a fancy blue diamond, the deeper the blue color will appear. Compared to other fancy colors, blue diamonds exhibit less variety in color appearance for the same color grade because the extent of their saturation possibilities are much more limited. The saturation of a colored diamond is determined by its intensity. Differences in color appearance are therefore credited to tone, which is the particular point that a diamond falls in the light to dark spectrum.


diamond blue 





Fancy blue diamonds are assessed according to intensity of color, or a combination of saturation and tone.  The following describe blue diamond intensities:


Light Blue, Fancy Light Blue, Fancy Blue, Fancy Intense Blue, Fancy Dark Blue, Fancy Deep Blue, and Fancy Vivid Blue



fancy blue diamonds 



The further along this spectrum you go, the richer and more intense the blue is to be seen in the diamond. The more intense a diamond’s color saturation, the more it will be worth. For example, a Fancy Intense Blue diamond will be worth more than a Fancy Blue. That said, apart from very saturated pure blues, stones that are a split grade containing an equally rare color of highest saturation, such as Fancy Vivid Green-Blue, are among the most desirable and valuable types of natural blue diamonds.

 natural blue diamonds




Secondary Color Modifiers


A color diamond is generally rare when it exists as one color without any additional modifying colors. The only instances that color in fancy blue diamonds experience even greater rarity and value than if such diamonds were to have just its primary color of blue are when the primary blue color is combined with equally, if not more, rare colors such as green and violet. A “fancy violet blue” of considerable saturation will therefore be a lot more rare and valuable than a color diamond that has only blue in a comparable saturation.


blue diamond colors 




Tone refers to the lightness or darkness of a blue diamond, and the continuum in between. GIA grading does not make a distinction in tones, but to the eye a stone with darker tones may appear more intense in color. For someone looking for the appearance of a Fancy Intense Blue without the price tag of one, a good option may be a Fancy Blue with a darker tone.


blue diamond tone 



Blue diamonds do not have a tendency to exhibit fluorescence to UV light. On those rare occasions when they do show fluorescence, the resulting color is faint and typically a dusty blue to green. In the final analysis, the enhancement to a stone’s aesthetics that fluorescence offers is entirely subjective.






In contrast to the vast majority of colored diamonds, fancy blue diamonds frequently have high clarities. The inclination towards a superior clarity is usually a result of the flawless composition of the diamond in its rough state. However, As with other fancy color diamonds, because of the acknowledged rarity and value of blue diamonds, a blue diamond’s clarity is far less of a consideration than actual color and intensity.




Because round cuts tend to produce lower color saturation, blue diamonds, like other colors, are generally cut into fancy shapes such as pear shapes, radiants, cushions, etc. Round cuts cause color desaturation because they are best at reflecting white light. In the case of blue diamonds, a round cut may make the blue color appear fainter, whereas a fancy shape, which reflects less white light, will maximize color saturation. Take note of uneven color distributions as well (these will be noted on your GIA certificate), as they can certainly affect a diamond’s appearance and value.


natural blue diamonds 




Natural blue diamonds enjoy a perch at the top of the hierarchy of rarity. They have historically been some of the rarest and infrequent color diamonds to appear on the market. The De Beers mine in South Africa has seen only one major fancy blue diamond emerge every year, merely underscoring the true dearth of blue diamonds that are available. The exceptional rarity of blue diamonds thus makes them highly valuable. Needless to say, natural fancy blue diamonds represent excellent  investment opportunities. The best investment choices for natural blue diamonds will be those that have deeper color saturation and the largest size your budget can accommodate. Color, size and clarity are the biggest factors that determine the blue diamond price.

 blue diamond value



Blue diamonds first originated from the Hyderabad region of India during the 17th century. India was responsible for the mining of nearly all gem diamonds during this prolific period. Four hundred years later, the Indian mines have experienced a drastic slowdown. The greater majority of the world’s blue diamonds now come from the Premier mine in South Africa.


Famous Blue Diamonds


The Hope Diamond: a 45.52 carat Fancy Dark Greyish Blue cushion cut, the Hope Diamond was originally procured by renowned French diamond dealer Jean-Baptiste Tavernier in 1642 and weighed 112.5 carats at the time. Of Indian provenance, the Hope Diamond was purchased by France’s King Louis XIV from Tavernier and subsequently transformed into a 67.12 carat triangular-shaped diamond. In the early years of the French Revolution, along with other diamonds, the Hope Diamond was the target of a theft and underwent two more recuts at the hands of its following owners to prevent its true identity from being discovered. With a final weight of 45.52 carats, the hefty blue diamond was sold to Henry Philip Hope in 1830. Nearly two centuries later, the storied diamond is now on display at the Smithsonian Institution in Washington, D.C. and is admired by millions who visit every year.


famous blue diamonds 


Idol’s Eye: from the Golconda region during the beginning years of the 1600s, the Idol’s Eye, a 70.21 carat triangular Light Blue diamond, was supposedly used as the eye of a religious idol and was thought to have been surrendered by its first owner to pay back his share of debt. It went missing for 300 years before Abdul Hamid II, the 34th Sultan of the Ottoman Empire, succeeded as its following owner in the early 1900s.


famous natural blue diamonds 


At Diamond Envy, we offer some of the rarest natural fancy blue diamonds. Whether you’re interested in a loose diamond for the investment potential or custom jewelry to give as an amazing gift for someone special in your life, shop our blue diamond collection today.