Contact a diamond consultant

a diamond consultant

Our award winning diamond consultants help you select the best diamond jewellery for any budget.
  • This field is for validation purposes and should be left unchanged.


Chameleon Diamonds, a rare gift of nature

January 31, 2017/ BY Frank van Poorten

Chameleon diamonds

If you find a colored diamond it’s  already quite an event. Colored diamonds are much rarer than white diamonds. But then there is a different category, the chameleon diamonds. Diamonds that under the influence of light and warmth changes color. But not once, the process repeats itself. The fascinating thing is that the stones are not only very rare. But that there is still very little is known about it. It’s for a few years now that there is research into the stones. And it will take years for all of the secrets of this rare green diamond all have discovered.

This in itself is a fact to consider the diamond as a wanna-have and to appoint it as a collector’s item for enthusiast and collector.



What do we know about these stones, how do they look?

Like the reptiles change color by itself to adapt to their habitat, chameleon diamonds color themselves. By the amount of light and the temperature of the environment. Under “normal” circumstances, they are green, but the color gamut of these stones is from brown to bright yellow/orange. If the stone is kept longer than 24 hours in the dark or be heated to 200 gr C. Then they be bright yellow / orange. However, this color change never lasts long

As the stones cool down or exposed to light then get the stones back to their original olive color. Usually within a minute or 10. But there is also observed that the chameleon stones not only from dark to light also discolor to dark colors under equal circumstances. So then a yellow-green base color and color the diamond to the dark olive color under the influence of light and heat.

 What is the cause of the discoloration?

Researchers still do not know well to explain where this behavior known as thermochromism, the fade under the influence of heat and the photochromism, the discoloration under the influence of light comes from. What is known is that these stones high levels of hydrogen and traces of nickel and nitrogen have to sit in the crystal lattice. This combination could be responsible for the changes in color, the up lighting- and the fluorescent properties of the Chameleon diamond.



When they were first discovered

Only in 1943, the first stone was investigated these properties to the Gemological Institute of America. For that were supposed to be just green diamonds. Several specialists associated with the GIA conducted a series of experiments and tests on 29 diamonds to determine the differences between the typical green stone and chameleons.

One of the researchers declared that an ordinary green diamond, which is exposed to extreme heat will permanently change of color, whereas a real chameleon is able to return to the original hue.


Well-known stonesresize

There are some famous stones that have these qualities, one of which is the greatest chameleon ever discovered and treated and that is Chopard, of 31.32 carats.
Another famous and beautiful stone of 8.8 carats was auctioned a few years auctioned at Christy’s and has raised $ 590,000. There is also an auction of 4 carats and has raised $ 240,000.

But there is also one that has a particular color. Despite the fact that this one is “as little as” 8:08 carat, it was estimated by GIA on a value of $ 2,100,000.

Colored diamonds

At Royal Coster Diamonds, we are amazed by rare diamond gifts from nature such as this Chameleon Diamond. Think for example about tanzanite, sapphires and black diamonds. This is why we have some amazing
Look at our colored diamonds collection

1 Comment

Royal Coster Diamonds