About Black Diamond Rings – A 2020 Review

About Black Diamond Rings – A 2020 Review

With coloured diamonds being all the rage right now, you might be considering making a bold colour choice for your diamond engagement ring. So why not consider one of the braver choices in precious stone – the black diamond. 

But just what makes the black diamond special? And what should you know before you make your purchase? We’ve rounded up the top facts, pros, and cons of black diamond rings. 

What’s the key to choosing a coloured diamond? 

When purchasing a coloured diamond, you need to consider the intensity level of the stone. Most coloured diamonds have a range of colour intensities: from Faint, to Fancy Light, to Fancy Dark. 

This range was determined by the Gemological Institute of America (GIA) as part of its grading scale for coloured stones. But unlike other coloured diamonds, black diamonds only come in one colour intensity: Fancy Black. So what makes black diamonds different from other stones?

Natural black diamond rings are believed to get their hue due to the makeup of the stone that surrounds it during development. When black diamonds are formed they are encased in minerals such as graphite. 

Black diamonds also have a different internal make up to colourless stones. Black diamonds are filled with inclusions (which are essentially small flaws). A black diamond has so many of these that its colour changes to black. 

So when choosing a black diamond, there is less to consider than when choosing other colourless stones. Forget clarity and colour. A black diamond is simply black. Cut is less important too, as a black diamond absorbs, rather than reflects light. 

Is a black diamond for me?

Black diamonds have a number of pros. They are exceptionally durable. In fact, one way to check that your black diamond is authentic is to scratch it with sandpaper. Only an authentic stone will be left unscathed after this test. 

On the Mohs scale of mineral hardness the black diamond gets a whopping ten out of ten. So if you do a lot of work with your hands, and plan on wearing your ring frequently, this is an excellent choice. 


Black diamonds are relatively affordable, since they are still less in demand than their sparkly brothers and sisters (despite actually being rarer). A one-carat black diamond ring will probably cost in the range of $3,000. But since colourful stones are a rising trend, the stone’s affordability might not last. Lab-made black diamonds will of course be less expensive than their natural counterparts. 

And although lab-treated diamonds are usually taboo, there are a few important differences between lab-treated black diamonds, and natural diamonds that might spark your fancy. 

Natural black diamonds are difficult to cut and polish. This is due to their makeup, which includes many compact layers. This is called “carbonado”. As a result, a finished black diamond product will always be imperfect to the naked eye, and will not be fully smooth. Changes are that the black diamond will also not be fully opaque, with a consistent black colour.  

A lab-treated black diamond, on the other hand, will have a smoother texture, and better colour. That is because these stones begin as regular colourless diamonds. 

So now that you know everything there is to know about black diamonds, you can get down to the fun part – in choosing a setting and metal to best show off your stone. And with a centrepiece as striking as the black diamond, the options are almost endless!