VVS1. VVS2. VS1. VS2. SI1. The grading terminology sounds precise until you realize most buyers can't tell the difference between them without a 10x loupe. Here's what these grades actually mean — and which one you should buy.

What Clarity Grades Actually Measure

Clarity grades measure the presence of inclusions (internal characteristics) and blemishes (surface characteristics) in a diamond. The GIA grading scale runs from Flawless (FL) down through Internally Flawless (IF), VVS1, VVS2, VS1, VS2, SI1, SI2, to Included (I1, I2, I3).

Here's the critical fact most salespeople gloss over: all grades from FL through VS2 are "eye-clean." That means you cannot see the inclusions with the naked eye. The difference exists under magnification only.

VVS — Very Very Slightly Included

VVS diamonds have inclusions that are extremely difficult to see even under 10x magnification. A trained grader with a loupe needs careful examination to find them. VVS1 inclusions are visible only from the pavilion (bottom) of the stone; VVS2 inclusions may be visible from the crown under 10x.

To the naked eye: completely clean. To everyone who sees your ring: indistinguishable from a Flawless stone.

Who should buy VVS: People who want the best documentation of quality, collectors, or buyers who will feel better knowing the stone is near-perfect under magnification. It's a psychological premium as much as a visual one.

VS — Very Slightly Included

VS diamonds have inclusions that are minor and difficult to see under 10x magnification. VS1 inclusions are hard to see; VS2 inclusions are somewhat easier to spot but still require magnification. Both are universally eye-clean.

Who should buy VS: Most buyers. This is the sweet spot for value — you get an eye-clean stone with a certified high clarity grade, at significantly less than VVS prices. The inclusions exist, but they don't affect how the diamond looks or performs.

SI — Slightly Included

SI1 diamonds have inclusions noticeable under 10x magnification. Many SI1 stones are still eye-clean — the inclusions are there but not visible without a loupe. SI2 is where you need to be careful: some SI2 stones are eye-clean, others have inclusions visible to the naked eye, particularly near the table of the stone.

Who should buy SI: Budget-conscious buyers who are willing to inspect each stone individually. An SI1 from a reputable source with certification and photos can look identical to a VS2. But buy from a source that shows actual stone photos or videos, not just grade documentation.

The VVS vs VS Price Difference

On a 1-carat round brilliant, expect to pay 15–25% more for VVS2 over VS1, with comparable cut and color. On a 2-carat stone, that premium can be $800–$1,500 for zero visual difference.

That premium buys you documentation, not appearance. Whether it's worth it depends on whether the certificate matters to you beyond the stone itself.

Cut Outranks Clarity Every Time

A VS1 stone with an Excellent cut will outshine a VVS1 stone with a Good cut in every lighting condition. Light return — the thing that makes a diamond sparkle — is determined by proportions and cutting precision, not clarity. If you're choosing between upgrading clarity and upgrading cut, upgrade cut.

What I Recommend

For most buyers, VS1 or VS2 is the rational choice. Eye-clean, certified, and priced sanely. Use the savings to get a better cut grade or more carat weight.

If you're buying for someone who cares about the certificate and wants the highest documented quality, step up to VVS2. Just know what you're paying for.

Ready to shop with clarity (pun intended)? Browse our diamond collection — all certified, all photographed. Or read our full guide on lab-grown vs natural diamonds and whether lab diamonds are real.