Black Diamonds – Everything You Need to Know

When we say the word diamond, what pops into mind is the colorless sparkling transparent stones that we are all so used to seeing.

So, the words black diamonds sound like a contradiction in terms! These stones were once pariahs of the jewelry industry and was even compared to ‘sealing wax’ by famous writer, J. R. Sutton.

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But thanks to clever jewelry designers and a brilliant marketing campaign that began in the mid-1990s, black diamonds went from inferior industry-grade-materials to becoming the next hot thing in the jewelry world!

As more and more people move towards non-conventional options for their jewelry, especially engagement rings, the black diamond stands out as a unique option.

If this is something that you would like to consider, then keep reading! Here we outline everything you need to know to purchase a black diamond.

Are Black Diamonds… Actual Diamonds?

Round black diamond closeup isolated
See more black diamonds here

Let’s start with the basics. Natural black diamonds have a similar chemical composition of colorless diamonds. They are composed of graphite, diamond and amorphous carbon and are the toughest of all the diamond varieties.


In general, colored diamonds receive their hues from impurities present during the formation process which cause chemical reactions that change the color. Interestingly, the color of the natural black diamond comes from the high level of impurities present within it.

Simply put, the diamond appears black due to the extremely high amount of microscopic graphite or sulfide inclusions (also called piques) dispersed in the stone.

Black diamonds are colorless diamonds that have inclusions to the point where they appear black and opaque.

Origin of Black Diamonds 

There is a lot of debate over how natural black diamonds came to be. Some believe that these were brought to earth on an asteroid, millions of years ago. Others theorize that they were formed deep within the earth under intense heat and pressure. Still others say that the impact of a meteorite caused shock metamorphism to occur and so create black diamond matter. There is no single accepted theory … which adds to the mystery of black diamonds.

Black diamonds are very rare and found in only a few regions around the world. The most plentiful include Brazil and Central Africa.

Are Black Diamonds Fake?

Black diamonds aren’t fake, but they come in a couple of versions.

Natural Black Diamonds:

These are mined from the ground and were formed over millions of years. These are the stones that command the highest prices and are the most sought after.

Treated Black Diamonds:

Because natural black diamonds are so rare and valuable, a large percentage of stones you see on the market are treated black diamonds.

To create these, first a low quality colorless diamond is taken, and then treated using intense heat or irradiation which then turns the color of the stone to black.

Often these have so many impurities that they cannot be used in jewelry. Treated black diamonds are quite affordable as they are made from low quality white diamonds.

On the market, these will sometimes be called colorless treated black diamonds or black colored diamonds.

Synthetic Black Diamonds:

These are exactly the same as their natural counterpart. The only difference is that these are created in labs from scratch as opposed to forming over millions of years in nature.

How Does the 4Cs Impact the Black Diamonds

Black diamonds are evaluated somewhat differently to other colored diamonds. The traditional 4Cs don’t apply – as these stones are quite different from their colorless counterparts.

Black Diamond Color:

Black diamond ring with rose gold metal
Black diamond ring pave setting by Sophinia Co. Check Price Here.

Unlike other colored diamonds, black diamonds have no variations of tone or saturation. This is why they have only one grade – Fancy.

As we have already discussed, the color in the stone comes from miniscule impurities and can be found from gray to vivid black. The color is dependent on the type of inclusions.

Sometimes, opaque sections surround transparent areas of the black diamond. This is because of the uneven distribution of impurities in the stone. Black diamonds with even color distribution are considered more desirable. 

Black Diamond Clarity:

This is the only variety of diamond where clarity is not graded. It is easy to understand why!

Black diamonds are heavily included and opaque. As a result, its clarity cannot be graded – there is no clarity to talk about.

Generally, retailers will have the term: Clarity Omitted when mentioning the clarity of a black diamond.

Black Diamond Carat:

Most black diamonds on the market are around the 1 carat mark. Because these stones are denser than their colorless counterparts, a 1 carat black diamond will be somewhat smaller than a 1 carat colorless diamond.

Large natural black diamonds are rare, so the higher the carat weight, the higher the price. If you see a large black diamond on the market, it is highly likely that the stone has been treated.

Black Diamond Cut:

Emerald cut black diamond
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You may have heard that cut is the most important factor in a diamond and that it is maximized to bring out the brilliance of the stone. That is true for colorless diamonds but not for black diamonds – which don’t have much sparkle.

Because black diamonds don’t reflect light properly, they don’t sparkle and have a very subdued luster. Faceting a black diamond will give the stone light reflection and more life. Black diamonds can be cut into all the popular gemstone cuts, like round, princess, cushion, marquise, pear, heart or cushion.

Black diamonds are known to be difficult to cut and polish, because of their natural structural patterns. As a result, they can easily crack or break apart during the arduous and long cutting process. Expert craftsmanship is required to bring out the best of the black diamond without damaging it during this process!

Are Black Diamonds Expensive?

Compared to other fancy colored diamonds which can come with extremely hefty price tags, natural black diamonds are quite affordable. Of course, this depends on the size and quality of the stone. Compare this 1.26 black diamond with this similar sized colorless diamond.  Although the sizes are similar, and both are excellent specimens of their respective categories, the difference in price is around $4000.

Smaller stones are within most diamond buyers’ budgets, while the larger carat sizes command much higher prices. Of course, heated black diamonds are much less expensive and can retail from upwards of about $300 per carat.

It is not recommended to buy a black diamond as an investment. Pink, red and blue diamonds are the top choices when it comes to colored diamond investing, as their value increases over time. A natural black diamond would have to be very unique in some way in order to be considered a good investment.

If you feel a black diamond is beyond your budget, you can always go for an onyx or a similar black gemstone. However, bear in mind that these stones are not as durable as a black diamond.

Black Diamonds in Engagement Rings

Black diamond engagement ring
Black diamond in solitaire setting. Check Price Here.

A black diamond engagement ring is a bold step and makes a striking statement! It is definitely not a feminine color, but instead comes across as a symbol of independence, confidence and non-conformity.

Most shoppers often have black diamonds as accent stones paired with a colorless diamond. This gives the ring a more neutral touch. You can also choose to have your centerpiece diamond surrounded by tiny black diamonds to create a halo.

Having said that, there are stunning engagement rings with black diamonds as the centerpiece. These are bold and eye-catching, and definitely unique.

Black diamond eternity band
Black diamond eternity band in yellow gold. Check Price Here.

Black diamonds pair well with yellow or white gold. For a classic look, that is simultaneously traditional and modern, choose yellow gold. For a modern vibe, pair with white colored metals, such as white gold, silver, platinum or palladium.

Because black is such a strong color, the clash of colors between the stone and the metal will give the ring a very striking look.

To design your own black diamond engagement ring, check the James Allen website which have a selection of loose black diamonds on offer.

How Do You Take Care of Black Diamonds?

Black diamonds are very hard stones, but they require more care than the average diamond. The reason is due to the numerous tiny fractures that are present in natural black diamonds. These can cause the stone to crack or break if subject to hard blows and knock. 

Another fact to note is not to use ultrasonic or steam cleaners when cleaning black diamonds, as these can cause damage. Instead, use a commercial jewelry cleaner or soap and warm water with a soft brush.

How to Buy Black Diamonds

Whether you purchase your natural black diamond online or at a physical store, your retailer should disclose to you whether the stone is natural or treated. Always ensure that you receive a certificate of authenticity from a third-party lab for your stone. GIA is considered to be consistent and very stringent when issuing diamond certificates.

Note that GIA does not provide analysis for treated diamonds.

Buying from a well-established and reputable vendor with good customer service and after-sales services is essential when purchasing high-end products like diamonds.

To start your search for loose black diamonds, we recommend searching on James Allen, which has a good collection of natural black diamonds. James Allen is known for their high quality, excellent customer service and ground-breaking diamond imagery. Click here to check out their diamonds.

Etsy is another excellent source for black diamond rings and jewelry. Always do your due diligence and check the reputability and customer reviews of each individual retailer on the platform. You’ll be able to find some excellent pieces here, including stunning antiques. Browse Etsy’s black diamond jewelry here.

FAQs About Black Diamonds

Are black diamonds worth anything?

Black diamonds aren’t a good investment and are much cheaper than other types of diamonds. But they can still cost a hefty sum, depending on the stone.

What makes a black diamond black?

The number of tiny graphite inclusions in the stone is what gives a black diamond its dark hues.

Do black diamonds scratch easily?

Black diamonds are still diamonds – which mean they’re one of the hardest substances in the world. So no, they don’t scratch easily. They can break however, due to the inclusions which can compromise their integrity.

Are black diamonds prestigious?

In the past, black diamonds used to be considered low-quality and were avoided. Today, as people gravitate towards more unique designs, black diamonds are viewed as a stylish statement in jewelry.

Dani Rhys

Dani Rhys has worked as a writer and editor for over 15 years in the jewelry niche. She holds a Masters degree in Linguistics and Education. She has always been interested in expression through fashion and accessories, and her extensive experience in the field has made her a respected voice in jewelry trends and education. As the chief editor of Jewelry Shopping Guide, she not only leads the content strategy but also shares her insights through engaging articles. Her passion for storytelling is reflected in every piece she curates, exploring the intricate relationship between jewelry and personal identity.

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