A diamond can look flawless to the naked eye without receiving the highest clarity grade. Tiny internal features often remain invisible unless examined under magnification. That distinction matters when choosing a diamond for an engagement ring or everyday jewelry.
A lab diamond clarity chart helps buyers compare grades based on inclusions, blemishes, and their visibility. The grading system follows the same clarity principles used for natural diamonds, making comparisons straightforward.
Still, a clarity grade tells only part of the story. Inclusion placement, diamond shape, and lighting can influence how a stone looks once set in jewelry.
The Diamond Clarity Scale Explained
The Gemological Institute of America (GIA) developed a clarity grading scale with 11 grades across six categories. Gemologists examine diamonds under 10× magnification, evaluating the size, number, position, nature, and visibility of clarity characteristics.
The following lab diamond clarity chart shows how each grade differs.
| Clarity Grade | Meaning | Typical Appearance |
|---|---|---|
| FL | Flawless | No inclusions or blemishes visible at 10× magnification |
| IF | Internally Flawless | No internal inclusions visible at 10× |
| VVS1 | Very, Very Slightly Included 1 | Extremely difficult inclusions to detect |
| VVS2 | Very, Very Slightly Included 2 | Minute inclusions, very difficult to see |
| VS1 | Very Slightly Included 1 | Minor inclusions, difficult to see at 10× |
| VS2 | Very Slightly Included 2 | Minor inclusions, somewhat easier to locate |
| SI1 | Slightly Included 1 | Noticeable inclusions under magnification |
| SI2 | Slightly Included 2 | More easily noticeable inclusions |
| I1 | Included 1 | Obvious inclusions that may affect appearance |
| I2 | Included 2 | Prominent inclusions that can affect transparency and durability |
| I3 | Included 3 | Severe inclusions that can significantly affect appearance and durability |
Clarity grades describe characteristics observed during examination. They do not guarantee that every diamond within a grade will look identical.
Two VS2 diamonds, for example, may contain different types of inclusions. One might have a tiny crystal near its edge, while another has a noticeable feature beneath the table.
Why Laboratory-Grown Diamonds Have Inclusions
Laboratory-grown diamonds form through controlled technological processes, but their crystal growth is not always perfectly uniform.
Manufacturers generally use two methods: High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD). Both produce real diamonds with essentially the same chemical composition and crystal structure as mined diamonds.
During growth, microscopic features can develop within the crystal. HPHT diamonds may contain metallic flux inclusions, while CVD diamonds can exhibit distinctive growth-related features.
These characteristics explain why lab made diamonds receive individual clarity grades rather than automatically qualifying as flawless.
The growth method alone does not determine clarity. Careful examination of the finished stone remains necessary.
Which Clarity Grades Offer the Best Visual Value?
Higher clarity grades usually command higher prices when other diamond characteristics are comparable. However, the visual difference between neighboring grades can be surprisingly small.
FL to VVS2: Exceptional Clarity
Flawless, Internally Flawless, and VVS diamonds appeal to buyers seeking extremely high clarity.
Their inclusions are absent or exceptionally difficult to detect under standard grading magnification. For everyday jewelry, the visual improvement over a well-chosen VS diamond may be negligible.
These grades make sense when rarity within the grading scale or technical perfection is a personal priority.
VS1 and VS2: A Balanced Choice
VS1 and VS2 diamonds often provide an appealing balance between appearance and price.
Many stones in these categories appear clean without magnification, especially in smaller sizes. However, eye cleanliness depends on the individual diamond, viewing distance, and lighting.
A carefully selected VS2 diamond can look virtually identical to a VVS stone during normal wear.
SI1 and SI2: Examine the Individual Stone
Slightly Included diamonds require closer inspection because inclusion visibility varies considerably.
Some SI1 diamonds appear clean from typical viewing distances. Others contain dark crystals or noticeable features near the center.
SI2 stones deserve additional attention, particularly in larger sizes or open settings. Detailed videos and grading reports help identify potentially distracting inclusions.
Inclusion Placement Matters More Than Buyers Expect
Clarity grading considers more than the number of imperfections. Their location can influence both the grade and the diamond’s visible appearance.
An inclusion directly beneath the table, the large flat facet on top, may attract more attention than one near the girdle.
Common clarity characteristics include:
Crystals: Minerals or diamond crystals enclosed within the stone.
Feathers: Internal fractures that may resemble fine white lines.
Clouds: Groups of tiny inclusions that can sometimes affect transparency.
Pinpoints: Extremely small inclusions that resemble dots under magnification.
Needles: Thin, elongated inclusions within the diamond.
Not every inclusion affects beauty or durability. A small feather near the surface deserves different consideration from a tiny pinpoint deep inside the crystal.
Diamond Shape and Carat Weight Change Visibility
Brilliant-cut diamonds contain numerous facets that reflect and scatter light. This pattern can make small inclusions harder to notice.
Round brilliant cuts often conceal minor clarity characteristics effectively. Oval and cushion cuts may also disguise inclusions, depending on their facet arrangements.
Emerald and Asscher cuts have broad, open facets that provide a clearer view into the diamond. Inclusions can become more apparent in these step-cut shapes.
Carat weight also matters. A larger diamond offers more visible surface area, making certain imperfections easier to identify.
For a two-carat emerald cut, VS1 may be worth considering. A smaller round brilliant could look equally attractive at VS2 or even a carefully inspected SI1 grade.
Reading a Grading Report Before Buying
A grading report provides independent information about a diamond’s characteristics. Depending on the laboratory and report type, it may include a clarity grade, measurements, growth method, and additional observations.
Some reports include a clarity plot showing the approximate positions of inclusions.
Buyers should compare the report with actual diamond images rather than relying entirely on the grade.
High-resolution videos are especially useful for checking dark inclusions, visible feathers, and transparency concerns. Viewing the stone face-up under ordinary lighting provides a more realistic impression than extreme magnification alone.
Reports from established laboratories such as GIA or IGI can support informed comparisons. Check the specific grading format, since laboratory-grown diamond reporting practices can differ.
Choosing Clarity Without Overspending
The most expensive clarity grade is not automatically the most attractive purchase.
Start by prioritizing cut quality, since proportions and light performance strongly influence sparkle. Next, choose a clarity grade that appears clean at a comfortable viewing distance.
For many engagement rings, VS1 or VS2 offers sufficient clarity without paying a premium for microscopic differences.
Before purchasing lab made diamonds, compare stones of similar shape, carat weight, color, and cut quality. Examine the actual inclusion pattern and request additional images when necessary.
A diamond that looks clean, performs beautifully in light, and fits the intended setting is often a better choice than one selected solely for its clarity grade.
