Clarity varies greatly in the lower end of the spectrum (SI1 and lower) but there are some easy ways to assess what is acceptable and what isn't.
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Diamond Council of America - Do you know all there is to know about diamond clarity? Our Diamond Studies Course delves into everything you need to know about the 4Cs of diamonds.
The Ultimate Diamond Guide: Understanding The 4 Cs - Jonathan Stein
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Diamond Clarity Chart Ultimate Guide to Diamond Clarity
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Diamond Clarity Chart
Diamond Clarity Chart Ultimate Guide to Diamond Clarity
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