Clarity
Clarity describes internal inclusions and surface blemishes created while a diamond forms.
The eleven clarity grades
| Range | What it suggests | Buying note |
|---|---|---|
| FL–IF | No inclusions or blemishes visible at 10× | Rare; usually a luxury premium |
| VVS–VS | Very slight to slight inclusions at 10× | Often eye-clean |
| SI–I3 | More readily visible features at 10× | Inspect the actual stone |
Inclusion types to recognize
Position often matters more than the headline grade. An inclusion hidden beneath a prong may disappear in normal wear, while one directly under the table can catch the eye. Feathers near a vulnerable girdle deserve a durability discussion, especially in exposed shapes. Ask for a plotted diagram, magnified video and face-up photos before deciding whether a VS or SI stone is truly eye-clean.
Why position beats the headline grade
Common inclusion types include crystals, feathers, clouds and needles. A crystal may be a mineral-like dot; a feather is a fracture-like feature; a cloud is a cluster of tiny points; a needle is a thin elongated inclusion. These names matter less than their contrast, location and effect on transparency. A dark crystal under the table can be more noticeable than several pale inclusions near the edge.
How to judge eye-clean appearance
The eleven-grade clarity scale is FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2 and I3. Graders evaluate inclusions and blemishes at 10× magnification, considering size, relief, position and nature. FL has no visible inclusions or blemishes at 10×; IF has no inclusions but may show surface features. VVS, VS, SI and I describe increasing visibility, not a guarantee that every stone in a category looks alike.
Clarity questions
Clarity is judged at 10×, but the buying question is what the eye sees in normal wear. The eleven grades run FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2 and I3. Crystal, feather, cloud and needle are useful inclusion names, yet size, relief and position matter more than vocabulary. A dark feature under the table may draw attention, while several pale edge marks disappear beneath a prong. Ask for a plot, magnified video and face-up photography. Compare actual stones rather than assuming every VS2 or SI1 has the same appearance, and use a return window for final confirmation.
Common mistakes
A clarity mistake is paying for FL when a VS or SI stone is already eye-clean. Examine inclusion position and contrast instead of shopping by label alone.
Our take
Do not ignore feathers near the girdle, clouds affecting transparency or dark crystals beneath the table. Ask for magnified imagery.
Frequently asked questions
What should I prioritize first?
Our take: buy the cleanest-looking stone at the setting distance you care about, with a return policy that lets you confirm the impression at home.
Can I see every grade difference?
For clarity, the report grade is a useful vocabulary. The actual inclusion map and face-up view are the evidence that should guide the final choice.
Is a grading report a guarantee?
Clarity FAQ: the eleven grades are not visual buckets; two stones with the same grade can differ because inclusion type, relief and placement differ.
Should I compare more than one diamond?
A report supplies a professional 10× assessment, but it does not certify that a stone will be eye-clean to every observer.
The GIA clarity scale has eleven grades: FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2 and I3. Clarity is judged at 10× magnification by trained graders, and the position, size, relief and type of an inclusion all matter. Two VS2 diamonds can look very different, so a grade alone cannot promise eye-clean appearance. Black crystals, feathers near a girdle, clouds that affect transparency and cavities deserve special attention. Ask for magnified imagery and a return window, especially when buying online. The purpose of the scale is comparison, not a promise that every stone in one category looks identical.
Magnification is useful, but ordinary viewing distance is the buying question. Start with a face-up inspection, rotate the stone, and note whether a feature repeats as a flash or remains fixed as a dark point. Examine the girdle and pavilion when the report mentions feathers, cavities or clouds. A prong may hide an edge inclusion, but it should not be used to disguise a durability concern. Online buyers should request a video focused on the actual stone, not a generic example. A clear return process is especially important when photographs are heavily retouched. A practical clarity review should also consider setting coverage, cleaning, lighting and the wearer’s normal viewing distance. These details make the grade useful without pretending it predicts every eye.
Related guides: Cut · Color · Clarity · Carat · Certificates · Lab vs Natural · Jewelers
Clarity decisions benefit from a repeatable routine. View the stone face up without magnification, rotate it slowly, then compare the report plot with the actual video. Ask whether a feature is dark, reflective, transparent or hidden near a prong. Cleanliness and lighting can change the first impression, so do not make a costly decision from one paused frame. The goal is not perfection for its own sake; it is confidence that the price, appearance and documentation agree.