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Naturally Colored Diamond Blog

Red Diamonds – Everything You Wanted To Know (Part 1)

Posted by Tony Cathaway on 2/7/17 10:14 AM

It is without a doubt that red diamonds are among the most captivating and magnificent stones ever to be found. Their color is a representation of love, passion, and strength, and is of such immense rarity that only an estimated 30 pure red stones have ever been found.

Everything you need to know - red diamonds.jpg

A cursory check online highlights the fact that there is just not enough information regarding these incredible stones. Therefore, we decided to compile the most interesting facts and pay tribute to one of the rarest and most breathtaking diamond categories to ever exist. This article will be split into two parts.

In this, part 1,of our red diamond tribute, we will be exploring what causes the beautiful red hue of these stones, as well as gaining a better understanding regarding their origin. In part 2, we review five of the world’s most famous red diamonds.

Why Are Red Diamonds Red? The Reason Behind Their Beauty

Due to their immense scarcity, there is little gemological information regarding red diamonds comparatively to other fancy colored stones.

The hue of colored diamonds is largely influenced by various chemical impurities, such as those caused by nitrogen and boron. Red diamonds however are wholly comprised of pure carbon. So how can a stone with no such impurities attain such a magnificent color?

HancockRed.jpgExperts believe that the red color is due to rare deformities in the stones’ anatomical structure which resulted from increased stress during their formation. These lattice defects internally bend and refract the light that enters, thusly giving them their characteristic hue. The aforementioned also explains why color vibrancy is highly related to the source of light. It has been observed that natural day light bringing out the best and most brilliant color, while florescent light often causes the diamonds to seem dull.

It should be noted that there is a plethora of color modifiers (prime examples of such include brown, purple, and orange tints) however, pure red diamonds have a much “sweeter” tone and are much more seldom.

Often times, diamonds than may initially appear to be red to the eye are actually fancy deep or dark pinks. The difference between a fairly deep pink and a moderately dark red can be very subtle and almost undistinguishable to an untrained eye; this especially true under poor lighting conditions.

The Exception

If you are a true diamond enthusiast you may have noticed that all fancy colored diamonds have prefixes such as “vivid” or “intense” when compared in a color grading scale. Red diamonds however are the only exception. The reason behind this is that most gemological laboratories consider the red color to unique, as well as, “intense” or “vivid” itself. That being said, there have been red stones found with slight differences in color depth, with hues ranging from a sweeter and lighter tone to those with a much deeper and darker tint.


Where Do Red Diamonds Come From?

Until 1985, when the Argyle mine commenced open pit operations, most red diamonds were sporadically found in mines located in Southern Africa, India, Indonesia, and Brazil.

argylemine.jpgThe Argyle mine has had a significant impact in the diamond industry. It ultimately became the fourth largest diamond producer by volume worldwide, contributing to roughly 90% of naturally colored diamonds even today. However, apart from being the world’s leading supplier of colored diamonds, the Argyle mine is best known for another reason; especially among investors. Since operations began, it was capable of producing precious stones whose grade and richness would eventually rewrite gemological text books. One such category of diamonds is known as the “Argyle Pink”. The “bubble gum” hue of the aforementioned diamonds was so unique that no other diamond found anywhere else in the world could rival it.

But why are we talking about pink diamonds when we are paying tribute to red diamonds you might ask. This brings us to our next point; scarcity.

Pink diamonds count for only 1% of stones mined in Argyle, and out of these pink diamonds only 1% has ever been graded as being pure red diamonds in the history of this mine. This truly emphasizes the rarity of these magnificent stones.

Sadly, supply is expected to dwindle even further in the upcoming years, as a closure of the mine has been announced for 2020 by Rio Tinto, constituting the abovementioned diamonds as potentially finite.

Do not miss part two of our red diamond tribute where we will be examining the most famous red diamonds ever to be found, as well as digging deeper into their history. 

For more reading on colored diamonds, see the links below:

price of colored diamonds