Clarity defines whether a precious stone has any visible inclusions or surface defects. Majority of minerals and gemstones have small inclusions. Flawless gemstones are rare and very expensive.

Clarity is affected by the visibility of inclusions, their size and number as well as their location. To measure gemstone clarity craftsmen use a Clarity Grading System like the one created by the Gemological Institute of America. There are different clarity standards for diamonds and colored gemstones. Higher relative clarity results in higher quality and price of a gemstone.

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