Imperfections or flaws in a diamond.
are tiny surface irregularities that mar the uniformity of the exterior of the pearl.
Since pearls have a natural element to their development, they can have natural imperfections. Blemishes reference a mark or "ding" that can be found on a pearls surface. Generally speaking, the more blemish on a pearl's surface, the lesser the quality. However in some cases marking or blemishes can be a symbol of authenticity and add "character" to the pearl such is the case for natural color Tahitian pearls.
Characteristics on a diamonds surface that will determine its clarity grade. Some of the more common blemishes are listed below: extra facet natural nick surface graining
This term is used to when the diamond has scratches or marks on the external area of the stone.
The term blemish is used when the diamond has scratches or marks on the external area of the stone.
Little marks, bumps, scars or irregularities on a pearl's surface that give a pearl strand its personality, although heavy marking will lower its value.
Minor nicks, marks, flaws or spots of discoloration that mar the surface of a coin.
Pimples, scars, spots, and other defects which may be softened or removed by negative retouching, print spotting, and/or airbrushing (sometimes called "artifacts").
This refers to the amount of external marks on a stone. Click here to learn more about blemishes and how they affect the clarity of diamonds.