Lab-Grown Diamond Clarity (2026): Grades and Eye-Clean Tips

What clarity should a lab-grown diamond have?

We would start with VS1–VS2, compare VVS2 if the price is close, and choose a diamond that looks clean without magnification. You do not need a flawless stone to get a beautiful ring. You also do not need to accept a visible mark just to buy a lower clarity grade.

The important distinction is between what a trained grader can see under magnification and what you notice while wearing the jewelry. Clarity grades help you shortlist diamonds. Your final choice should also consider where the inclusions are, the stone's appearance and the actual price difference.

We apply those checks when comparing grading reports and magnified seller videos, then relate them to the lab-grown diamond jewelry we have bought, returned and inspected. An inclusion that dominates a rotating 20× video may disappear at normal size, while a dark mark under the table can remain distracting.

This guide explains the grades, how to read a clarity plot and how we would inspect a diamond online. For choosing the other Cs alongside clarity, see our diamond buying guide.

What are inclusions and blemishes?

Inclusions are features within the diamond; blemishes are on its surface. Common examples include crystals, pinpoints, clouds, needles and feathers; surface features can include polishing lines, scratches and small chips. Some are difficult to find even under magnification. Others can be noticeable or affect the stone's transparency or durability.

Lab-grown diamonds can have these characteristics too. Growing a diamond in a controlled environment does not mean every crystal will be flawless.

It is easy to think that the fewest marks must always be best. In practice, one dark inclusion under the center can matter more to your enjoyment than several tiny, pale marks near the edge. Their nature and location matter as well as their number. Features that reach an exposed edge or pointed corner deserve particular attention because location can matter for durability as well as appearance.

How diamond clarity is assessed

Clarity grading considers the size, number, position, nature and visibility of the characteristics, using 10× magnification. The word relief describes how strongly an inclusion stands out from its surroundings. A dark feature may be easier to notice than a faint one of similar size.

A grade brings these observations together. It does not give you a complete map of how the diamond will look on your hand. That is why we also want a clear view of the individual stone.

Magnified videos are useful for locating inclusions, but do not judge a diamond only at the biggest zoom setting. A tiny mark that fills your screen may be invisible in everyday wear.

After finding the characteristics at high magnification, reduce the image toward a realistic viewing size and watch the diamond through a full rotation. This two-step check helps separate report details from marks you are likely to notice in the finished jewelry.

Why clarity matters—and when to stop paying for it

We want a diamond that looks clear and lively, with no distracting mark. Beyond that, an extra clarity grade may improve the description more than the appearance.

The price matters. In today's lab-grown market, higher clarity does not always bring a large premium. If a VVS2 diamond costs little more than a similarly attractive VS2, there is nothing wrong with choosing it. If the difference is substantial and both look clean, we would not pay more solely for the letters.

What does “eye-clean” mean?

Eye-clean means you cannot see inclusions with your unaided eye at a normal viewing distance. It does not mean there are no inclusions at 10× or 20× zoom.

Sellers may use different viewing conditions when calling a stone eye-clean. Ask whether the assessment is from above, at what distance and whether any mark is visible from the side. This is especially useful for an open setting that exposes much of the diamond.

The most useful final check is simple: look at the finished piece normally, then more closely, during the return period. You should not feel drawn to a mark every time you look at the ring.

Clarity versus cut and carat weight

We would usually protect cut quality before paying for clarity that makes no visible difference. A well-cut, clean-looking VS diamond can be more enjoyable than a higher-clarity stone with weak light performance.

Carat weight changes the decision too. A larger diamond gives you more area to inspect, and the type of facet pattern can reveal or disguise characteristics. Emerald and Asscher cuts have broad, open-looking facets that deserve a careful clarity check. Brilliant-cut patterns can make small inclusions less obvious, but do not automatically hide everything.

For earrings, matching the two diamonds matters as much as chasing the best individual grade. For a prominent center stone in a ring, we would spend more time looking at the exact inclusion positions. Our cut guide explains why sparkle should remain part of the comparison.

Are mined and lab-grown clarity grades comparable?

The familiar FL-to-I3 scale describes clarity characteristics, not the diamond's origin. Lab-grown diamonds can receive detailed clarity grades just as mined diamonds can. The kinds of inclusions may differ, but a lab origin does not excuse a visible or troublesome inclusion.

Do not assume every laboratory currently issues the same document. Check what the report actually says about the stone you are buying.

How lab-grown diamond reports describe clarity

IGI lab-grown reports include individual clarity grades. GIA changed its D–Z lab-grown service in October 2025 to Premium or Standard overall assessments. Premium requires VVS or higher clarity; Standard requires at least VS, alongside other quality criteria. An older detailed GIA report and a new assessment therefore do not present the same information. GIA explains the change here.

The clarity scale

The familiar scale has eleven grades within six groups. The descriptions below refer to a skilled grader working at 10× magnification, not to what every buyer will see unaided.

The definitions follow GIA's clarity scale. A VS grade is a useful starting filter, not a guarantee that two diamonds have identical appearance.

How to read a clarity plot

A clarity plot maps important characteristics onto diagrams of the diamond from above and below. Read its legend to identify the symbols. It can help you find a feature in the video, particularly one beneath the table or near an exposed edge.

The plot from this guide is useful because it turns an abstract grade into positions you can look for. It is not a photograph and does not reproduce the appearance of a mark at normal size. A cluster of red symbols can look more alarming on the diagram than the corresponding features do in the stone.

Not every report includes a plot. When there is no diagram, read the comments and ask the seller to point out the grade-setting features in a video or extra photograph. The goal is to understand the stone, not to reject it simply because its report has a different layout.

Our lab-grown diamond clarity buying tips

1. Choose a useful range of grades

Start with VS1–VS2 for a round diamond and compare the available VVS2 prices. If the saving from dropping to SI is small, we would usually stay with the cleaner shortlist. For a large diamond or a step cut, include higher clarity grades and inspect closely rather than using a fixed rule for every stone.

Keep cut, color, weight and grading lab comparable when judging prices. A cheaper SI diamond is not necessarily a bargain if it is also smaller, more tinted or less well cut. Our lab-grown diamond price guides explain how we compare similar stones across sellers.

2. Inspect the actual diamond

Open the grading report and confirm it belongs to the listed diamond. Then watch the actual video through a full rotation. Look for dark marks under the center, haziness, obvious lines and features near the edge that you want the jeweler to explain.

Use magnification to find the features, then reduce the view to a more realistic size. Ask for another image when the lighting or video quality makes the diamond hard to judge. Do not substitute a generic product photograph for a view of the actual loose stone.

If a feather or other feature could affect durability, ask the seller's gemologist about it rather than trying to diagnose the risk from the name alone. Location and extent matter.

3. Compare the finished purchase

Check the complete price with the setting, and read the return terms before ordering. Once the jewelry arrives, inspect it in ordinary indoor light and daylight. A diamond should look good in the conditions where you will wear it, not just under a jeweler's spotlights.

We would begin loose-diamond comparisons at Ritani and include Blue Nile for a broader ring-shopping comparison. Both should let you inspect the individual stone and report rather than relying on the clarity label alone.