What Is a VS1 Diamond Clarity Grade?

Clarity Grade Guide

The VS1 Clarity Grade

VS1 is the ceiling of visible value: the highest grade whose advantages your eye can still collect. Everything above it is certificate territory. Everything below it needs a closer look. VS1 needs neither.

Very Slightly Included 1

What VS1 Actually Means

A VS1 diamond contains minor inclusions that are difficult for a skilled grader to see at 10x magnification, most often small crystals or faint feathers positioned away from the center of the stone. Every VS1 diamond is eye clean, without exception and without needing individual verification. That reliability is the grade's entire character.

On the value curve, VS1 marks an inflection: it is the last grade where stepping up buys anything the certificate alone can appreciate, and the first grade where stepping down requires checking the individual stone. Buyers who want certainty without ceremony land here, and they are right to.

FL
IF
VVS1
VVS2
VS1
VS2
SI1
SI2
I1+
RarestMost included

Where VS1 sits on the GIA clarity scale. The full scale, grade by grade, lives in our complete clarity guide.

The Neighbor Argument

Step Up, Stay, or Step Down

Every clarity decision is really a comparison with the grades on either side. Here is that comparison, made honestly.

Above: VVS2

When to Step Up

Step up for large stones and step cuts where a near-empty interior earns its keep.

This Grade: VS1

When to Stay

Choose VS1 when you want guaranteed eye cleanliness with zero per-stone homework. It is the strongest default on the scale, and the correct floor for emerald and asscher cuts.

Below: VS2

When to Step Down

Step down for brilliant cuts under two carats; the savings are real and the risk is minimal.

Every stone we recommend is scored by ROSI™, our gemological intelligence, built by our gemologists, with clarity verified by a human eye against the actual stone. Request a ROSI™ Score Report on any diamond, ours or anyone else’s.

Shape Guidance

Where VS1 Belongs

VS1 is the recommended floor for step cuts: emerald and asscher interiors are on permanent display, and VS1 keeps them clean without exception. In brilliant cuts it is effectively a luxury, since VS2 and verified SI1 stones achieve the same look for less.

Shape by shape guidance, including face-up size tables and what to demand on each certificate, lives in our shape guides.

An Honest Word
VS1 is the last grade your eye can appreciate. Above it, you are collecting paper.

This makes VS1 both a superb choice and a boundary marker. If you are considering anything above it, ask what the additional money buys that the eye can find; the honest answer is rarity and reassurance, not appearance. If you are considering anything below it, the question flips to verification, which is work we do gladly. Standing exactly on the line, VS1 asks nothing and hides nothing.

91.4
ROSI™ Score
Know exactly what a diamond is worth before you buy it.

Found a diamond you are considering, here or anywhere else? Send the GIA or IGI certificate number and our gemological team returns its ROSI™ Score and a read of where it sits in the current market. Complimentary, within minutes.

Score a Diamond
Fair Market ReadSample · Live market data
$4,650This diamond sits here$5,400

Where stones of the same exact specifications are trading on the open market right now. You get a straight answer, even when the diamond is not ours.

Questions

VS1 Clarity Questions, Answered

Is a VS1 diamond eye clean?
Yes, always. VS1 inclusions are difficult to find even at 10x magnification and are never visible to the naked eye. It is the highest grade at which this guarantee is simply a property of the grade rather than of the individual stone, and the lowest grade that requires no per-stone verification.
VS1 vs VS2: which should I buy?
For brilliant cuts under two carats, VS2 gives you the same face-up look for less in most cases. For step cuts, larger stones, or buyers who want certainty without reviewing videos, VS1 is worth its modest premium. The honest summary: VS2 plus verification equals VS1 minus the certainty.
Is VS1 good for an emerald cut diamond?
It is our recommended floor for emerald and asscher cuts. Step cut facets display the interior openly, and VS1 is the grade at which that display is reliably immaculate without checking each stone individually.
Is VS1 clarity worth it over SI1?
It depends on who does the checking. A verified eye clean SI1 looks identical to a VS1 and costs meaningfully less, but the word verified is doing real work in that sentence. VS1 is the price of skipping the verification. With a gemologist doing it for you, the SI1 route usually wins.
Talk to a Jeweler

Considering a VS1? Have a gemologist read it first.

John Anderson, our Lead Gemologist, reviews VS1 certificates and stone videos for clients every day. Send him any diamond you are considering and he will tell you what the certificate proves, what it cannot, and what your eye will actually see. The consultation is complimentary and there is no obligation.

1-800-779-1726
40 Day Returns60 Day Complimentary ResizingLifetime WarrantyGIA & IGI Certified