Due to the natural occurrence of diamonds in the earth and the inherent characteristics that result from the extreme heat and pressure that created them, all diamonds have unique internal characteristics. These internal characteristics are known as inclusions. External characteristics found on diamonds are known as blemishes. The extent of inclusions and blemishes in any given diamond are what determine diamond clarity.
Diamond clarity is assessed at 10x magnification, as many inclusions aren’t visible to the naked eye. Even diamonds that have been classified as flawless may have visible inclusions at higher magnifications.
In order to accurately evaluate the clarity of a diamond, a gemologist reviews the number, size, relief, nature, and position of the inclusions and blemishes, to determine where the diamond falls on the GIA International Diamond Grading System. The diamond is then assigned a clarity grade that ranges from diamonds that are virtually Flawless (FL), to diamonds with obvious inclusions (I3). Discounted, less favorable diamonds will typically have less desirable characteristics that are not mentioned on the diamond report, such as those with black inclusions, or a milky appearance.
Even though many inclusions and blemishes are too small to be evident to the naked eye, they still affect the price of diamonds. That said, unless a diamond is heavily included, small internal and external characteristics have no effect on a diamond’s ability to reflect light and sparkle radiantly.
As Boston’s premier diamond jeweler, we proudly offer the most beautiful and radiant selection of diamonds available for every budget and style preference, regardless of their clarity rating.