Diamond Clarity Chart: Which Flaws Are Visible and Which Aren't?

Most first-time buyers assume a flawless diamond will look noticeably cleaner than a VS or SI stone next to it. It usually won't. Inclusions form while a diamond is still growing, often a billion years before anyone mines it, and most are microscopic, invisible without 10x magnification, let alone to the naked eye.

That gap between what's on the certificate and what you can actually see is where buyers overspend. This chart breaks down what each clarity grade really means, which inclusions show up to the eye, and where your money is genuinely well spent.

What Is Diamond Clarity?

Clarity measures two things. Inclusions form inside the stone during growth trapped minerals, tiny fractures, clusters of pinpoints under enormous heat and pressure underground. Blemishes sit on the surface, usually left behind during cutting and polishing.

GIA standardised the FL-to-I3 scale in the 1950s, around the same time it standardised diamond colour grading, so buyers could compare stones on the same terms instead of trusting a seller's word. Clarity is one of the 4Cs every diamond is graded against, and it's the one buyers most often overpay for.

Diamond Clarity Chart Explained

Step 1: FL (Flawless)

A Flawless (FL) diamond has no inclusions or blemishes when viewed under 10× magnification. These imperfections are not visible to the naked eye. Buyers typically choose FL diamonds for their rarity rather than for a noticeable improvement in appearance, as they command a significant price premium.

Step 2: IF (Internally Flawless)

An Internally Flawless (IF) diamond has no internal inclusions, with only very minor surface blemishes visible under 10× magnification. These blemishes are not visible to the naked eye. While IF diamonds are highly prized, they offer only a minimal visual improvement over VVS diamonds despite their higher cost.

Step 3: VVS1 (Very, Very Slightly Included 1)

A VVS1 diamond contains extremely minor inclusions that are very difficult to locate even under magnification. These inclusions are not visible to the naked eye. It is an excellent choice for buyers with a larger budget who want an almost flawless diamond.

Step 4: VVS2 (Very, Very Slightly Included 2)

A VVS2 diamond also has extremely minor inclusions, though they are slightly easier to detect under magnification than those in VVS1. These inclusions remain invisible to the naked eye. VVS2 offers a strong near-flawless appearance while typically costing less than VVS1.

Step 5: VS1 (Very Slightly Included 1)

A VS1 diamond has small inclusions that are visible under 10× magnification but are generally rarely visible to the naked eye. It provides excellent value, especially for diamonds weighing more than one carat, because it combines outstanding appearance with a more affordable price.

Step 6: VS2 (Very Slightly Included 2)

A VS2 diamond contains minor inclusions that are slightly easier to spot under magnification than those in VS1. These inclusions are rarely visible to the naked eye. It is widely considered one of the best value clarity grades because it offers an eye-clean appearance at a reasonable price.

Step 7: SI1 (Slightly Included 1)

An SI1 diamond has noticeable inclusions under magnification, but they are usually not visible to the naked eye. This grade can provide excellent value, although buyers should inspect the diamond carefully or review a clarity plot to ensure the inclusions do not affect its appearance.

Step 8: SI2 (Slightly Included 2)

An SI2 diamond contains more noticeable inclusions that may affect transparency. These inclusions are sometimes visible to the naked eye. Buyers should inspect the diamond in person or review detailed images and clarity plots before purchasing.

Step 9: I1 (Included 1)

An I1 diamond has inclusions that are visible to the naked eye. These inclusions can impact the diamond's beauty and brilliance. Because of the noticeable imperfections, I1 diamonds are generally not recommended for engagement rings.

Step 10: I2 (Included 2)

An I2 diamond has obvious inclusions that are visible to the naked eye and can reduce its sparkle and overall brilliance. This clarity grade is generally best avoided due to its noticeable imperfections.

Step 11: I3 (Included 3)

An I3 diamond has significant inclusions that are visible to the naked eye and may affect both the diamond's appearance and durability. Because of these major flaws, I3 diamonds are generally not recommended for most buyers.

Which Diamond Flaws Are Visible?

Feather an internal fracture, a thin line under a loupe. Small ones are invisible; a large one reaching the surface can be visible and, rarely, a durability concern.

Crystal is a trapped mineral. Small white ones vanish; large dark ones stand out and can push a stone into I1 territory.

Cloud a cluster of pinpoints. Small clouds are harmless; a dense, large one can scatter light and give the stone a faint haze.

Needle a thin crystal, almost always microscopic and irrelevant to appearance.

Pinpoint the most common inclusion in VS and SI stones, rarely visible without strong magnification.

Twinning wisp a faint band from irregular growth. Small ones vanish; larger ones can decide whether an SI2 reads eye-clean.

Cavity a surface opening from a removed crystal or natural pit. Large ones are visible and can collect residue over time.

Which Clarity Grades Are Usually Eye-Clean?

Eye-clean means no inclusion shows at normal viewing distance in normal light. It has nothing to do with what a loupe reveals.

VS1 and VS2 are eye-clean in almost every case. SI1 usually is too, though placement under the table facet matters more than the grade itself; a small feather near the edge is invisible, the same feather under the table isn't. SI2 is a mixed bag: some are genuinely eye-clean, others show a visible cloud at a glance. This is the grade where checking the stone, or its clarity plot, stops being optional.

SI1 vs VS2: Which Offers Better Value?

Mounted in a ring, a well-chosen SI1 and a VS2 are usually indistinguishable to the eye. Both pass the eye-clean test.

The real difference is consistency, not appearance. VS2 has smaller, better-placed inclusions across the board, so the odds of landing an eye-clean stone are higher. SI1 varies more stone to stone but costs less per carat for the same size and colour.

Buying online without inspecting the stone, VS2 removes the guesswork. If you can see the diamond or its clarity plot, SI1 usually stretches the budget further, money better spent on a stronger cut grade.

Does Diamond Shape Affect Inclusion Visibility?

Yes. Round, cushion, princess and radiant are brilliant-style shapes built from many small facets that scatter light into busy patterns, and that optical noise camouflages inclusions well. Round generally hides flaws best of all.

Emerald and Asscher are step cuts. Their large, flat facets act like a hallway of mirrors, with nowhere for an inclusion to hide. A grade that's safe in a round brilliant can show in an emerald cut, so VS1 or better is the safer floor for step cuts. Cushion and princess fall in between depending on faceting style.

Does Higher Clarity Mean More Sparkle?

No, and this is the most common misunderstanding buyers bring into a purchase. Sparkle comes from cut: brilliance, fire and scintillation depend on proportions and faceting, not inclusions. Our guide to diamond cut grades is worth reading before clarity for that reason.

Clarity only affects sparkle when an inclusion is large enough to block light internally, usually an I1-to-I3 problem. A VVS1 and a well-chosen SI1 with the same cut grade sparkle the same.

Best Diamond Clarity Grades for Most Buyers

For a round brilliant under two carats, SI1 to VS2 covers nearly every need and stretches a budget furthest. Above two carats, move up to VS1, since inclusions get easier to spot as facets grow larger. For step cuts, VS1 is the floor regardless of weight.

VVS and Flawless make sense for very large stones or buyers who specifically want that grade on paper; neither is really about how the diamond looks on the hand. Clarity is the C with the most room to save without anyone noticing.

How to Read a Diamond Clarity Plot

A clarity plot maps a diamond from above, marking where inclusions and blemishes sit. Red shows internal characteristics; green shows external ones like polish lines.

Location matters more than count. An inclusion under the table facet is in the most visible spot possible; the same one near the edge, under the bezel facets, is far less likely to be seen. Every diamond Dorrado sells comes with a certificate that includes this plot comparing two similarly graded stones on which it usually settles, which is the safer pick.

Expert Buying Tips

Buying clarity before cut is the most common mistake; a poorly cut VVS looks flatter than a well-cut SI1. Writing off SI2 automatically is another; some are excellent value, so ask for the plot first. Ignoring shape matters too; the same grade behaves differently in a round versus a step cut. And chasing Flawless for the wrong reason rarely pays off: it won't look better than VS2, it just reads differently on paper.

FAQ

Can you see SI1 inclusions without magnification?

Usually not, though it depends on the inclusion's size and placement. Checking the clarity plot removes the guesswork.

Is VS2 clarity good enough for an engagement ring? Yes. It's one of the most dependable eye-clean grades and a common choice specifically because it removes SI-grade risk.

Are flawless diamonds worth the extra cost?

For most buyers, no. The jump from VVS to FL or IF buys rarity, not a visible improvement.

What clarity grade offers the best value?

SI1 if you can inspect the stone or plot, VS2 if you want eye-clean certainty without that step.

Can inclusions affect durability?

Occasionally. A feather reaching the surface, or a cavity near a prong, can be more vulnerable to chipping. This is rare and mostly an I1-and-below issue.

Does clarity affect sparkle?

Barely. Sparkle comes from cut. Clarity only matters when an inclusion is large enough to block light internally.

Expert Takeaway

VS1, VS2 and most SI1 diamonds are eye-clean. SI2 can be, but check it stone by stone. Anything I1 or below carries visible flaws and isn't worth it for an engagement ring.

SI1 and VS2 sit at the best value on the clarity scale close enough in appearance to be indistinguishable on the hand, far enough apart in price to matter. Pay for higher clarity when the stone is large, the shape is a step cut, or owning a top-tier certificate matters to you personally. Otherwise, put that budget into cut, which has the bigger effect on how a diamond actually looks.

For how clarity fits alongside cut, colour and carat, our complete diamond buying guide walks through comparing stones the way a gemologist would.