Clarity: The GIA Clarity Scale includes eleven clarity grades ranging from Flawless to I3. Given that diamonds form under tremendous heat and pressure, internal and external characteristics are common. These characteristics help gemologists separate natural diamonds from synthetics and stimulants, and identify individual stones. There are two types of clarity characteristics: inclusions and blemishes – the difference is based on their locations. Inclusions are enclosed within a diamond while blemishes are confined to its surface.
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