A diamond can be technically flawless and still not be the most beautiful choice for your ring, earrings or pendant. The art of how to select diamond clarity is knowing where rarity adds real value, and where it simply disappears once the stone is set and sparkling in the light. Choose with your eyes, your design and the occasion in mind.
How to Select Diamond Clarity for Your Piece
Diamond clarity describes a diamond’s internal characteristics, known as inclusions, and external characteristics, known as blemishes. These natural features formed while the diamond developed deep within the earth. They are part of a stone’s individual story, but they can affect transparency, brilliance and, at higher levels, durability.
A trained grader assesses clarity under 10x magnification. The grade reflects the number, size, position, nature and visibility of these characteristics. That distinction matters: a feature that looks significant on a grading report may be completely invisible when viewed normally, while a small inclusion directly beneath the table can be easier to notice.
For most fine jewellery buyers, the goal is not perfection under a loupe. It is a diamond that looks clean, bright and captivating when worn.
The Diamond Clarity Scale, Made Clear
The internationally recognised clarity scale moves from flawless to included. Each grade has its place in a considered diamond purchase.
Flawless and Internally Flawless
FL diamonds have no inclusions or blemishes visible at 10x magnification. IF diamonds show no internal inclusions at that level, although tiny surface blemishes may be present. These stones are exceptionally rare and command a substantial premium.
They are compelling collector pieces, particularly in large, important diamonds with strong colour and cut credentials. Yet their visual advantage over a carefully selected VVS or VS diamond is usually impossible to see without magnification. If your priority is maximum rarity, they are extraordinary. If your priority is visible beauty per carat, there may be more strategic places to invest.
VVS1 and VVS2
Very, Very Slightly Included diamonds contain minute inclusions that are extremely difficult for a skilled grader to locate at 10x. They offer remarkable purity and are highly desirable in heirloom-quality engagement rings, investment-grade diamonds and designs where the stone is viewed up close.
VVS clarity is especially appealing in a larger diamond, where any characteristics are naturally easier to detect. It also pairs beautifully with a high colour grade, creating an exceptionally crisp, luminous overall impression.
VS1 and VS2
Very Slightly Included diamonds have minor inclusions visible under 10x magnification but often appear entirely clean to the unaided eye. For many luxury buyers, VS clarity is the sweet spot: refined, high quality and visibly pristine in most settings.
A VS1 diamond may suit those who want added assurance in a large solitaire or an emerald cut, while a well-chosen VS2 can deliver spectacular value. The exact placement and type of inclusion matter more than the code alone.
SI1 and SI2
Slightly Included diamonds have noticeable inclusions under 10x magnification. Many SI1 diamonds are eye-clean, particularly in smaller sizes or brilliant cuts, making this grade a smart option for buyers who prefer to allocate more of the budget to carat weight, exceptional cut or a distinctive setting.
SI2 diamonds require more careful inspection. Some are beautiful and wearable; others may show inclusions without magnification or have characteristics that influence transparency. This is where certification, clear imagery and expert guidance become essential.
I1, I2 and I3
Included diamonds have characteristics that are obvious under 10x and may be visible to the naked eye. Inclusions can affect sparkle and, in some cases, structural security. These grades can make sense for certain budget-led designs, but they are generally not the first choice for a high-value centre stone intended to be worn for decades.
Eye-Clean Matters More Than a Perfect Number
Eye-clean means no inclusions are visible at a normal viewing distance without magnification. It is not an official grading term, and it is not identical for every person or every diamond. A buyer with sharp eyesight may notice a characteristic that another person never sees. So can a setting that exposes the stone from every angle.
Ask to view the diamond in high-resolution images and video, then assess it in relation to its actual size. A small inclusion on a 0.50-carat diamond can be less noticeable than an equivalent feature in a 3-carat stone. Consider where it sits as well. Inclusions close to the edge may be disguised by a claw or bezel, while those beneath the centre table are more likely to draw attention.
An eye-clean VS2 or SI1 can be a more rewarding choice than a VVS diamond that forces a compromise on cut quality or proportions. Sparkle is the statement. Clarity should support it.
Match Clarity to Diamond Shape and Cut
Not all shapes reveal inclusions in the same way. Round brilliant diamonds are exceptionally forgiving because their facets create intense scintillation. A carefully selected SI1 can look immaculate in a round brilliant, especially below larger carat weights.
Step-cut diamonds, including emerald and Asscher cuts, are different. Their broad, mirror-like facets create an elegant hall-of-mirrors effect, but they also make inclusions and colour easier to see. A VS1, VS2 or higher grade is often a wise choice for these shapes, depending on stone size and the location of the characteristics.
Oval, pear, marquise and radiant diamonds sit between these two extremes. Their faceting can conceal minor inclusions well, but avoid prominent features near the pointed ends of pear and marquise diamonds, where durability deserves close attention. Cushion cuts vary widely in facet pattern, so every stone should be judged individually rather than purchased by grade alone.
Let the Setting Do Some of the Work
A solitaire setting places the centre diamond in full focus. For a large solitaire, it can be worthwhile to select a stronger clarity grade because the stone is so visible from every angle. This does not automatically mean flawless. A beautifully eye-clean VS diamond can look sensational.
Halo rings, pavé bands and three-stone designs offer more visual movement and brilliance around the centre diamond. These settings can make a lower clarity grade appear even cleaner, provided the centre stone has no obvious inclusions. Bezel settings can conceal edge characteristics while offering a sleek, contemporary finish.
For diamond stud earrings, clarity can often be balanced more flexibly. Earrings are viewed from a greater distance than a ring, so matching cut, colour and overall brilliance usually matters more than paying for an ultra-high clarity grade. A harmonious pair is the luxury detail.
Read the Certificate, Then Look Beyond It
For a significant diamond, an independent grading report from GIA or IGI provides valuable assurance. Review the clarity grade alongside the plotted diagram, which maps significant characteristics. The diagram is useful, but it does not tell you everything about visibility, light performance or beauty.
Pay attention to the nature of inclusions. Tiny crystals, needles and feathers may have very different visual effects depending on their position. Feathers near a vulnerable edge deserve particular scrutiny, especially in pointed shapes. Clouds can also affect transparency if extensive, even when they are not individually easy to see.
Clarity should never be assessed in isolation. An excellent cut can make a diamond look alive with light, while a poorly cut high-clarity diamond may appear flat. Colour, carat weight, shape, fluorescence and proportions all contribute to the final presence of the stone.
Where to Spend, and Where to Be Selective
If you are choosing an engagement ring or a milestone diamond, start with the visual priorities that matter to you. Some buyers want a larger centre stone that reads beautifully across the room. Others want icy colour and exceptional rarity. Neither approach is more correct.
As a practical guide, choose the lowest clarity grade that looks fully clean to your eye in the chosen shape and setting. For many round brilliants, this may be VS2 or SI1. For larger emerald cuts and Asscher cuts, it may be VS1 or better. For collector-level stones, VVS and flawless grades may be part of the appeal because rarity itself is the point.
At Gabe.Zac Fine Jewellery, the most memorable diamonds are selected for more than a line on a certificate. They are chosen for fire, balance, confidence and the way they become part of your signature.
A diamond is worn in candlelight, sunlight, celebration and ordinary Tuesdays. Select clarity that lets the stone look luminous in every one of those moments, then let its brilliance say the rest.