As an independent retailer, understanding the blemishes and inclusions that influence a diamond’s ultimate clarity grade is essential in procuring a great range of diamonds for your customers. When attempting to understand a diamond’s clarity, gemologists will look for two things: surface flaws (blemishes) and internal flaws (inclusions).
The grading system used for diamond clarity
Naturals: They refer to the original parts of the rough diamond that are left on the newly cut diamond for saving the diamond weight.
Scratches and cuts: They can be results of natural stress lines or due to the cutting process. If you’re looking for a diamond with as few blemishes as possible, make sure you work with a high-quality diamond cutter for the best result.
Crystals: The most common inclusions are crystals (tiny bubbles), which at one point were minerals absorbed into the diamond during its formation process .Tinier versions of these bubbles – or pinpoints – are typically so small that gemologists can only spot them with powerful microscopes.
Knots: They are also common inclusions: a knot is a tiny diamond crystal that has been pushed to the surface of the cut diamond.
Cavities: They are small holes that are created in an effort to remove knots.
Beards: They are tiny marks that resemble feathers.
Growth lines (similar to stress lines): They arise as a natural result of the formation process.
Clouds: They are groups of inclusions closely clumped together that resemble clouds underneath the microscope.
The grading system used for diamond clarity: