Fancy Blue diamonds are known to be some of the rarest color diamonds. Fancy Violet diamonds are also exceedingly rare and occur in predominantly small sizes, ranging from 0.10 carat to 0.30 carat.

During the 17th century, Blue diamonds were first mined in India. The majority of the world's Blue diamonds now come from the Premier mine in South Africa and account for less than 0.1% of their total diamond yield. Violet diamonds were discovered in Kimberley, Western Australia in the late 1980s.

How they get their color: The blue color in diamonds is caused by the presence of boron within the diamond. The greater the amount of boron, the deeper the blue color will appear. Violet color diamonds have the presence of hydrogen as a trace element.

Blue colored diamonds are rarely found with a pure blue color. They often contain overtones that are present due to the result of the boron elements contained within. The most common secondary hues found with Blue diamonds are Gray Blue, Grayish Blue, Violetish Blue and Green Blue. Similarly, Violet diamonds tend to exhibit visible overtones of blue or gray, affirming the complete scarcity of pure Violet diamonds.

Blue Diamonds are most often connected to royalty, prestige and sophistication. Hope Diamond, the most famous Blue diamond in the world today, holds an estimated value of $250 million USD. This antique Cushion-cut 45.52 carat stone extracted in India is of Fancy Deep Grayish Blue color and VS1 clarity grade

Green color diamonds are among the rarest of the color diamond family. Most of the world’s current production of fine natural green diamonds comes from South America or Africa. Up to 0.03% of mined diamonds are natural Fancy Green Diamonds.

How they get their color: Unlike most colored diamonds that derive their colors from impurities and other elements, Fancy Green Diamonds get their color when radiation displaces carbon atoms from their normal positions in the crystal structure. This can happen naturally when diamond deposits lie near radioactive rocks, or artificially as a result of treatment by irradiation. However, the drawback here is that only those portions of the stone that come into direct contact with radiation will show green color, thereby resulting in a diamond with uneven color. Majority of the Fancy Green Diamonds are called skin stones, as their green color is caused by remnants of radiation impressed on the ‘skin’ of diamonds. Consequently, body color Green diamonds are prohibitively rare and valuable.

Fancy Green Diamonds most often contain one or two secondary hues. The various overtone colors of a green diamond found are Yellowish, Blue, Bluish, Brown, Brownish, Gray, Grayish, Gray Yellowish, and Grayish Yellowish.

As the green color is considered to be an embodiment of life, Green diamonds signify youth, vitality and balance. One of the largest and finest natural green diamond ever discovered is the ‘Dresden Green’, a 40.70 carat, pear shaped stone with a VS1 clarity grade originated in India.

Yellow is the most common fancy color, however is generally less valuable than rarer colors such as pink and blue. Fancy Orange is pretty rare, with up to 0.3% of gem-quality diamonds having some hue of orange. Pure orange color is even rarer.

Although abundant compared to other colored diamonds, Fancy Color Yellow diamonds represent a small portion of overall diamond production. They offer a wide range of possibilities to jewellers, owing to the beauty and depths of color in which they occur.

Fancy Orange diamonds though relatively rare, don’t present as much value as the other rare colors due to lower market demand.

How they get their color: Yellow color is caused due to the presence of nitrogen within the stone’s crystal structure. Usually, the nitrogen atoms are replaced with carbon atoms which react with light to create a yellow color. Once a stone demonstrates a yellow hue that extends beyond the ‘Z’ color grading scale, it is considered as a Fancy Yellow diamond. Fancy Orange diamonds get their color due to a combination of structural deformities and the presence of nitrogen.

Yellow diamonds have Canary yellow, Brownish-yellow, Greenish-yellow and Orange-yellow variants. Orange stones come in Reddish-orange, Yellowish-orange and Brownish-orange.

These Fancy Colors can very well be termed as rarest of the rare. Fancy Red diamonds with pure color are almost impossible to come by, with only 30 true Red diamonds reported to have ever been mined. Fancy Pink diamonds represent 0.5–1% of all fancy color diamonds extracted till date. These stones attract incredible appreciation in prices and hence have phenomenal investment value. The Argyle diamond mine in Australia which has produced over 90% of the Fancy Pink Diamonds available in the market today, had to be closed in 2020 as it exhausted its resources, making these rare gems even more coveted.

How they get their color: The reason for pink color in diamonds remains a mystery to experts. Scientific evidence suggests that Pink diamonds contain high pressure graining which results in a compressed internal structure, and that is believed to be the origin of the color. This process referred to as ‘Plastic deformation’ or mutation of the atomic lattice, is the reason for how Fancy Red diamonds get their color as well.

Fancy Red diamonds though seldom available in their pure color, are somewhat attainable in secondary hues such as Brownish Red or Purplish Red. Some diamonds may appear to be pure red, but are actually Fancy deep or Fancy dark pinks. Brownish Pink, Orangy Pink and Purplish Pink are the common overtones found in Fancy Pink diamonds.

Pink and Red diamonds are known to represent feminity, love, romance, passion, luxury and nobility. Every collector’s dream, Red and Pink diamonds have been sold for remarkable prices in various auctions and stones like the Moussaieff Red and the Hancock Red Diamond are known to be the most magnificent diamonds in existence.