The vast majority of all diamonds have inclusions – impurities on the inside of the diamond. Most inclusions are not visible to the naked eye. The diamond is given a score after experts from an institute like GIA have studied it for impurities under a tenfold magnification through a microscope.
Inclusions can obstruct the sparkle of a diamond. They block the reflection of light if they are in the path of the light.
Of course, impurities should not impeach the beauty of the diamond. To guarantee that, we only select diamonds with inclusions that are not visible to the naked eye.
Two types of inclusions:
The clarity of the diamond can be flawed in two ways, affecting the diamond’s quality:
External impurities occur during the cutting process or are the result of daily use.
Internal impurities involve inclusions inside the gemstone. There are different types.
Most common inclusions:
The most common internal inclusions consist of three subtypes. Black or dark spots inside the diamond are generally forms of coal. Then there are clouds, which are microscopic veils. Lastly, there are ‘feathers’. These are the most prevalent inclusions and are the result of molecular fractions that arose during the thousands of years-long formation process of diamonds.