A clarity comparison becomes useful when two diamonds are in front of you. VS1 sits above VS2 on the conventional clarity scale, yet the letters alone cannot tell you which stone you will prefer in a finished ring. Begin with the appearance you can see, then connect it to the report.
This guide is for choosing between individual stones. For an introduction to VS and VVS categories, read Diamond Clarity: Looking Beyond the Letters.
Set up a fair comparison
Ask for clean diamonds of the same shape, with similar millimeter dimensions, color and cutting style. Carat weight matters, but two stones of equal weight can have different visible footprints. Note any difference that might distract from the clarity question.
Start in ordinary diffuse light at a comfortable reading distance. View the diamonds without first being told where their inclusions are. Then use magnification with the jeweler, and return to the unaided view. Record both impressions: what you noticed naturally and what you could locate after it was pointed out.
“Eye-clean” needs an agreed viewing condition. It is a seller's description, not a universal laboratory grade. Ask whether it means face-up only, at what distance and under which lighting.
Use this comparison sheet
| Record for each candidate | Stone A | Stone B |
|---|---|---|
| Laboratory, report number and date | Fill in | Fill in |
| Natural or laboratory-grown identity | Fill in | Fill in |
| Shape and length × width × depth in mm | Fill in | Fill in |
| Reported clarity and color terminology | Copy exactly | Copy exactly |
| Feature noticed before magnification | Describe or “none noticed” | Describe or “none noticed” |
| Feature seen after loupe examination | Location and appearance | Location and appearance |
| View from the side, if accessible | Describe | Describe |
| Condition or setting concern identified by jeweler | Record finding | Record finding |
| Your preference in the intended design | Record reason | Record reason |
Photographs can help you remember the candidates, but lighting, focus and screen size change how an inclusion appears. A photograph is supporting information rather than a replacement for examination.
Interpret the inclusion, rather than counting marks
Clarity grading considers the size, nature, number, location and visibility of characteristics, conventionally at 10× magnification. One prominent feature and several faint features are not interchangeable. A plotting diagram is a map for finding characteristics, not a score to calculate by counting symbols.
A dark feature beneath the main viewing area may be more conspicuous than a pale feature elsewhere. Broad, open facets can make observation easier. These are reasons to inspect the stone, rather than rules that automatically reject a grade or shape.
Where a feature reaches the surface or lies near an exposed point, ask about its implications for setting and condition. Hiding it beneath a prong is not the same as resolving a structural concern.
Work through a decision
Imagine two comparable stones: A is VS1 and B is VS2. In the viewing conditions you agreed, neither has a feature you notice unaided. The jeweler identifies the characteristics under magnification and finds no condition issue affecting the proposed mounting. This is an illustrative decision, not a description of stock.
In that situation, VS1 remains the higher documented clarity grade. It does not follow that A gives you a more attractive everyday view. You can decide whether the documented distinction matters more to you than the candidates' other qualities and the finished design.
If B has a feature that you repeatedly notice without magnification, the practical distinction is different. Write down the viewing condition and what you saw; “VS2 is always eye-clean” would not answer your concern.
Check the reporting format
Read the document actually supplied. GIA's revised D-to-Z laboratory-grown diamond service, introduced in October 2025, uses overall Premium and Standard assessments. Standard is not a synonym for VS2; it combines criteria across several characteristics. Do not translate an overall descriptor into an individual VS grade that the document does not give.
For any laboratory, verify the report through its official service and connect the measurements and identifying details to the stone offered. Older reports and different services can use different terminology.
The strongest choice is the one you can explain: the appearance you prefer, the findings you understand and the setting that suits the stone. The comparison sheet keeps those reasons visible after the appointment.
Sources: GIA diamond clarity; GIA laboratory-grown assessment update; IGI report verification.
