Naturally occurring black diamonds are really hard to find. These diamonds, in fact, come in the list of the rarest stones on the planet. Black diamond is something that you could always purchase, either if you like to expand your collection of stones or if you want to invest in it. The demand for this stone is also rising steadily. This may make you wonder about how valuable are these stones, or what factors would determine the value of the stone. This could be understood only by finding out what these stones really are and how they are examined.
The Color of the Stone
The diamond actually gets its color during its formation. There are a number of things, which affect the color of the stone; lattice defects give the diamond red or pink color, irradiation results in green color in the diamonds, while chemical impurities like boron and hydrogen produces blue diamonds, and nitrogen traces give yellow color to the stone. However, black diamonds do not get their color due to any of these factors. It is the millions and trillions of miniature inclusions that give the black diamond its natural color.
These inclusions, usually referred to as “carbonados”, are spread all through the stone making it look dark. You would also find treated black diamonds in the market today, which are usually ‘treated’ by subjecting the stone to very high temperature and radiation. This is done for giving the stone a uniform color, shine, and depth.
It is shocking to see that a majority of the black diamonds that you would find in the market are actually artificial diamonds. These diamonds are usually more affordable when compared to natural diamonds. Hence, you should always keep an eye on what you are purchasing. Oval engagement rings featuring a natural black diamond centerpiece would look absolutely unique, and would be priced reasonably for that.
Certification and Grading of Black Diamonds
Checking the grading of a diamond is very important when you are thinking about purchasing one. A diamond is usually graded by reviewing its 4 C’s, which helps you in ascertaining the overall quality of the stone. The value of the diamond is also determined based on whether it is treated or natural, as well as taking into account the defects that could be seen in the stone.
It is always advised to buy a black diamond with accredited gemological certification from popular institutions like the GIA or AGS. The diamond grading report from such nonprofit bodies not only guarantees the quality of the stone but also plays a great role in determining its resale value.