What does eye-clean mean for a diamond or gemstone?
By Jared James · Last updated 21 May 2026
Definition
Eye-clean describes a gemstone whose inclusions are not visible to the naked eye when viewed face-up at a normal viewing distance of around 25 to 30 centimetres. The term is widely used for diamonds: a stone graded SI1 or SI2 on the GIA clarity scale may still be eye-clean depending on where its inclusions sit and how they catch light, even though they are visible under a 10x loupe. It is a practical standard that many buyers use to find good clarity without paying for flawlessness they cannot see anyway.
Frequently asked questions
- Is an SI1 diamond eye-clean?
- Many SI1 diamonds are eye-clean, but it depends on the nature and position of the inclusions. A large dark crystal near the table will be more visible than a feather near the edge. Always view the stone face-up before buying.
- Is eye-clean the same as flawless?
- No. Flawless means no inclusions are visible even under 10x magnification, which is a much higher standard. Eye-clean simply means the stone looks clean in normal wear and is far more attainable and affordable.
- What clarity grade is eye-clean for a diamond?
- It varies by stone, but most VS1 and VS2 diamonds are eye-clean, and many SI1 diamonds are too. SI2 can go either way. There is no universal rule because the type and placement of inclusions matters as much as the grade.
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