A pure diamond is a diamond without any stains or scratches. In most cases, these signs or defects are not visible to the naked eye. However, for larger black spots, it is sometimes possible to see them even without using a magnifying glass. The value of such diamonds is significantly lower than that of pure diamonds.
The purity of diamonds is determined by two types of defects.
1. Internal defect: Appears inside the diamond. This is commonly referred to as defects.
2. External Defect: Appears on the surface of the diamond. This is often called stains.
These defects usually appear in the diamonds during the natural formation process. However, sometimes defects also occur during cutting and polishing.
Diamonds are created under great pressure and therefore it is hardly surprising that many diamonds have small bubbles, spots, scratches, and stains. People rarely find a perfect diamond. These diamonds are extremely expensive not only because they are rare but also because they are perfect.
Transparency and Resilience
Another reason that a diamond of good purity is appreciated is that the more a diamond is, the more brilliant it becomes. A diamond with internal defects and stains can change the way the light enters. So, even with the best cuts, a diamond with internal defects can not reflect back many of the light coming into the diamond. This leads to a decrease in glow and therefore, diamonds with defects have a lower value.
Diamond Grading Classification
Use a magnifying glass to classify the purity of a diamond. A diamond magnifying glass magnifies 10 times its original size. With a magnifying glass, a trained eye can easily see defects inside and outside of the diamond. Even beginners can spot cracking easily by using a magnifying glass.
GIA and AGS have a full set of measures to determine the diamond’s degree of purity including the type list, size and location of the defect. The purity of the diamond is measured from perfection to the imperfect inclusion.