What Clarity Grade Is Enough If I Want an Eye-Clean Diamond?
For round brilliant diamonds, VS2 is almost always eye-clean — meaning no inclusions are visible to the naked eye at a normal viewing distance. SI1 is frequently eye-clean as well, depending on the nature, size, and position of the inclusions. These two grades represent the practical sweet spot where you get a visually clean diamond without paying for clarity you cannot see.
What "Eye-Clean" Actually Means
Eye-clean is not a GIA grade. It is a practical standard: can you see any inclusions when you look at the diamond face-up, without magnification, at a distance of approximately 25–30 cm (about arm's length)?
GIA grades clarity under 10x magnification — a level of scrutiny far beyond what your eye delivers in normal life. Many inclusions that distinguish one clarity grade from another are completely invisible without a loupe. The practical question is not "does this diamond have inclusions?" (almost all do) but "will I ever notice them?"
Clarity Grade by Eye-Clean Likelihood
| Grade | Eye-Clean? | Notes |
|---|---|---|
| FL / IF | Always | No inclusions visible even under 10x magnification |
| VVS1 / VVS2 | Always | Inclusions are extremely difficult to find even for trained graders under magnification |
| VS1 | Always | Minor inclusions visible only under magnification |
| VS2 | Almost always | Occasionally a VS2 has an inclusion near the table that is marginally visible in larger diamonds |
| SI1 | Usually | Depends on inclusion type and position. Many SI1 diamonds are eye-clean, some are not |
| SI2 | Sometimes | Higher chance of visible inclusions, especially in diamonds above 1 carat |
| I1 / I2 / I3 | Rarely | Inclusions typically visible to the naked eye |
Why VS2 Is the Default Recommendation
At VS2, the inclusions are minor enough that even when you look through a loupe, you often have to search for them. To the naked eye, they are invisible. This grade offers a reliable guarantee of eye-clean appearance across virtually all diamond shapes and sizes.
The price difference between VS2 and VVS1 can be 10–20% or more — money that produces no visible improvement. Redirecting that saving toward a higher cut grade or larger carat weight yields a tangible benefit.
When SI1 Works
SI1 can be an excellent value choice, but it requires individual evaluation:
Likely eye-clean SI1 diamonds:
- Inclusion is a small crystal or feather positioned under a bezel facet (off to the side, not directly under the table)
- Inclusion is a needle or pinpoint — small, colourless, and non-reflective
- Round brilliant cut with strong light return, which helps mask minor inclusions through sparkle
Likely NOT eye-clean SI1 diamonds:
- Inclusion is a dark crystal directly under the table
- Inclusion is a large cloud that reduces transparency
- Step-cut diamond (emerald, Asscher) where large, open facets act like windows and make inclusions more obvious
The key principle: at SI1 and below, you must evaluate the specific diamond, not just the grade.
Shape Matters
Different shapes have different eye-clean thresholds:
Round brilliant — the most forgiving shape. The brilliant facet pattern breaks up inclusions visually, making them harder to spot. VS2 and often SI1 are safe.
Oval, cushion, pear — brilliant-cut fancy shapes are similarly forgiving, though the larger facets near the centre of elongated shapes can expose certain inclusions. VS2 is reliably safe; SI1 requires case-by-case evaluation.
Emerald and Asscher — step cuts are the least forgiving for clarity. Their large, flat facets offer clear visibility into the stone's interior. Consider VS1 or better for step cuts if eye-clean is important to you.
How to Verify Eye-Clean
Reading a grading report tells you the grade but not the full story. The inclusion plot shows the type and location of inclusions, which helps — but the best method is direct visual inspection.
At Arete Diamond, our HD video and detailed photography let you examine each diamond's inclusions at high magnification. If an inclusion is invisible in our HD video, it will certainly be invisible to the naked eye. This takes the guesswork out of the eye-clean question entirely.
Learn More
- Eye-Clean: What It Means and Doesn't — the full guide to the eye-clean standard
- Diamond Clarity — the GIA clarity scale explained
- GIA Clarity Scale — all eleven grades in detail
- Clarity Characteristics — types of inclusions and blemishes