What can diamond quality tell us about Earth? | BNT Diamonds
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What can we learn about Earth through diamond quality?

20 Jul 21
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  • How are diamonds used for research?
  • What about diamond quality can give us these insights?
  • In which other scientific fields does diamond play a part?

Large and unusual diamonds have been increasingly gracing auctions over the past years, with exceptional diamonds being found more often all around the world. Their quality might not always be of the highest investment value, but they do hold great scientific value. How can diamond quality help science? What can we learn from diamonds?

How are diamonds used for research?

The presence of diamonds is becoming increasingly more common in the field of geology. They help explore parts of our planet deep under the earth’s crust where no machine has yet been able to penetrate. Since diamonds form so deep underground and are transported to the surface in Kimberlite, they possess unique qualities not found in any naturally formed rock on the planet’s surface. Especially diamonds of exceptional quality and size are ideal for research since they are often formed even deeper underground than more common diamonds.

Gems such as the famous Cullinan or the Lesotho diamonds distinguish themselves in value through unique chemical makeups and extraordinary sizes. Cut-off materials left over after polishing these exquisite stones have proven most helpful in geological exploration.

What about diamond quality can give us these insights?

When speaking of diamond quality, we recognise 4 major factors: cut, clarity, carat and colour. Clarity denotes certain inclusions within the gem which got locked in there during the formative stages. These inclusions are the most important factor during research. Colour, on the other hand, is achieved by the diamonds chemical makeup being penetrated by different types of chemicals or changes in their crystal structure. Blue diamonds contain boron, purple diamonds contain hydrogen and green diamonds colour through radiation. It has been noted that exceptional gems contain far less nitrogen than other diamond types, almost always resulting in a type II diamond.

The inclusions in these diamond-types have taught us that the Earth’s core is surrounded by molten metals such as iron and nickel, with limited oxygen. Furthermore, they revealed to have formed between 360 and 750-kilometre depths, far deeper than the 150 to 200-kilometre depths where most other diamonds take shape.

In which other scientific fields does diamond play a part?

Not only for geology has diamond quality played a significant part, it has also helped us make great strides in space exploration. As with their formation underneath the Earth’s crust and close to the core, diamonds include particles during their formation in space as well. Among other things, they have proven other planets once had a hot core such as ours which has allowed us to make educated estimations of the size of planets outside of our own solar system. Some scholars even entertain the possibility that all black diamonds on the planet could be extraterrestrial. Although highly included diamonds might not make for great investments, they turn out to be valuable in their own way.

How can I invest in a coloured diamond of my own? Which types of coloured diamonds best fit my portfolio? Contact the diamond investment experts at BNT Diamonds for your perfect diamond investment.

With this article, BNT Diamonds strives to inform you thoroughly about investing in diamonds. No investment can be guaranteed to be without risk or fully according to your expectations. That is why we recommend to research the risks and aspects of investing in diamond properly to ensure that you make the right choice for your portfolio.