All diamonds are considered rare, but did you know that diamonds come in different colors? You might think that diamonds can only be white, but diamonds can actually be gray, white, blue, yellow, orange, red, green, pink to purple, brown, and black, and pretty much any other color of the rainbow.

But do you know what color of diamond is considered the rarest? Read on to learn more!


Pure Diamonds

Manufacturers are creating diamonds in different colors now to help satisfy the demand for exoticly colored stones. But a pure diamond is perfectly transparent and has no hue. But almost no natural diamonds are absolutely perfect – most stones have natural inclusions that can affect the price of the stone.

The color of a diamond is affected by chemical impurities or structural defects. This can either detract or add to the stone’s value. When a white diamond has a more yellow hue, it can be discounted but a blue or pink diamond (like the Hope Diamond) can be considered more valuable.

The Rarest Color of Diamonds

But of all of the colors of diamonds, rarest of all are red diamonds. Red diamonds are made purely from carbon, and the red color is created by a deformation in its structure. This is called “plastic deformation”. The irregular lattice in the diamond creates an unusual bend in the light which gives the diamond its ruby red appearance. Red diamonds can look best viewed in candlelight. Their color can range from darkish pink to a purple red, bordering on magenta. The stronger the red hue of the diamond, the more value the diamond will have.


If the diamond is “predominantly red” it means that red is the primary color with no secondary colors.  So rare are red diamonds, GIA records show that there was a 30 year stretch of time between 1957 and 1987 where no single red diamond was registered.


Famous Red Diamonds


The 0.95 ct Hancock Red, was auctioned by Christie’s New York on April 28, 1987 and sold for $880,000.



The 5.11 ct Fancy Moussaieff Red. Its estimated value is $20 million dollars.



And always remember, treating a stone for any reason will detract from its value.