How rare is a black diamond?

Unlike other colored diamonds, black diamonds gain their distinct color through a mixture of graphite and amorphous carbon, as opposed to naturally occurring interactions with other elements such as nitrogen or boron.
Also known as ‘carbonados’, the mysterious allure of natural black diamonds make them a favorite with collectors and lovers of statement jewelry, as well as a popular choice for engagement rings and men’s bands.

In this natural black diamond education article, we'll provide you with all the information you need to make an informed purchase. We’ll explain how these stones are formed, how they are graded and, most importantly, how you can determine the natural black diamond prices before you make an invaluable investment. Whether you are looking to buy a piece of jewelry, add to your diamond collection, or make a secure investment for the future, this article will help you make the right decision.
How are natural black diamonds formed?
Whereas other fancy colored diamonds are formed as a result of sustained interactions with elements such as boron or nitrogen during the creation process, natural black diamonds owe their unique coloration to a large number of inclusions (defined as small imperfections present in all diamonds) that are spread throughout the stone. Although these inclusions are usually comprised of graphite, it is not uncommon to find traces of magnetite and hematite as well.

As such, natural black diamonds are formed in essentially the same way as colorless diamonds but they have so many inclusions that they take on a black color. The large number of inclusions also means that natural black diamonds, unlike other colored stones, are usually opaque.

How exactly is the formation process different from white diamonds?
While they are formed in the same conditions as white diamonds, precisely how black diamonds come to have the large number of inclusions that lend them their distinctive color remains a mystery.
The more mundane explanation is that they are the result of high pressure conditions in the earth’s interior combined with dark inclusions of graphite. However, this theory does not explain why the stones are found almost exclusively in Brazil and the Central African Republic.

A more exciting theory holds that natural black diamonds were part of a star that exploded 3.8 billion years ago. Having drifted through space for 1.5 billion years, the stones crashed to earth as part of a meteorite and have been here ever since.

Although not as rare as pink fancy colored diamonds or even yellow diamonds, natural black diamonds are still exceptionally rare, and more so than colorless diamonds. However, as they can be less expensive than colorless diamonds, this may be a surprise to some.

The reason for their relatively low prices is simply that there has not been as large a demand for them as there has been for colorless or other colored diamonds. However, this is slowly changing as in the past few years demand has increased and so too, naturally, have prices.

Unfortunately, as the demand for black diamonds has increased, so too has the number of treated black diamonds. As such, most black diamonds one sees on the market are not genuine, nor rare.

Are black diamonds popular for engagement rings and other jewelry?

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