Introduction
When buying a lab-grown diamond, clarity is one of the most important factors that affects its appearance and value. Many buyers focus on carat weight and color, but understanding lab diamond clarity grades can help you make a smarter purchase and get the best value for your money.
Clarity refers to the presence or absence of internal characteristics called inclusions and external characteristics called blemishes. Just like natural diamonds, lab-grown diamonds are graded for clarity using strict industry standards. These grades help buyers understand how clean a diamond appears under magnification and to the naked eye.
The good news is that most lab-grown diamonds are created in highly controlled environments, allowing manufacturers to produce stones with exceptional clarity. As a result, buyers often have access to higher clarity diamonds at a more affordable price compared to natural diamonds.
In this guide, you’ll learn what lab diamond clarity grades mean, how diamonds are graded, which clarity grades offer the best value, and how to choose the right clarity for your budget and jewelry needs.
What Are Lab Diamond Clarity Grades?
Lab diamond clarity grades are standardized classifications used to measure the visibility of inclusions and blemishes in a lab-grown diamond.
Professional grading laboratories such as GIA and IGI evaluate diamonds under 10x magnification and assign a clarity grade based on the size, location, quantity, and visibility of imperfections.
The fewer imperfections a diamond has, the higher its clarity grade.
Types of Clarity Characteristics
Inclusions
Inclusions are internal characteristics found inside the diamond.
Examples include:
- Pinpoints
- Feathers
- Clouds
- Crystals
- Needles
- Internal graining
Blemishes
Blemishes are surface characteristics found on the outside of the diamond.
Examples include:
- Scratches
- Polish marks
- Natural marks
- Surface graining
- Extra facets
The Official Lab Diamond Clarity Grading Scale
Lab-grown diamonds use the same clarity grading system as natural diamonds.
FL (Flawless)
A flawless diamond contains no inclusions and no blemishes visible under 10x magnification.
Characteristics:
- Extremely rare
- Highest clarity grade
- Premium pricing
- Exceptional visual purity
IF (Internally Flawless)
Internally Flawless diamonds have no internal inclusions but may have very minor surface blemishes.
Characteristics:
- Nearly flawless appearance
- Rare and highly desirable
- Often chosen by collectors
VVS1 and VVS2 (Very Very Slightly Included)
These diamonds contain extremely tiny inclusions that are difficult for even expert graders to see under magnification.
Characteristics:
- Exceptional clarity
- Nearly impossible to detect imperfections
- Popular for luxury engagement rings
VS1 and VS2 (Very Slightly Included)
VS diamonds contain minor inclusions that are visible under magnification but usually invisible to the naked eye.
Characteristics:
- Excellent balance of beauty and value
- Eye-clean appearance
- Highly popular among buyers
SI1 and SI2 (Slightly Included)
SI diamonds contain noticeable inclusions under magnification and sometimes visible inclusions without magnification.
Characteristics:
- More affordable
- Good visual appeal
- Popular budget-friendly option
I1, I2, and I3 (Included)
These diamonds contain obvious inclusions visible without magnification.
Characteristics:
- Lower clarity
- Reduced brilliance
- Lower market value
Lab Diamond Clarity Grade Chart
| Clarity Grade | Visibility of Inclusions | Eye Clean? | Value |
|---|---|---|---|
| FL | None | Yes | Highest |
| IF | Almost None | Yes | Very High |
| VVS1 | Extremely Difficult to See | Yes | High |
| VVS2 | Very Difficult to See | Yes | High |
| VS1 | Difficult to See | Yes | Excellent |
| VS2 | Slightly Visible Under Magnification | Usually | Excellent |
| SI1 | Noticeable Under Magnification | Often | Good |
| SI2 | More Noticeable | Sometimes | Moderate |
| I1-I3 | Easily Visible | No | Lower |
How Clarity Is Graded in Lab Diamonds
Professional graders examine diamonds using specialized equipment and strict grading procedures.
Factors considered include:
1. Size of Inclusions
Larger inclusions generally reduce clarity grades more than smaller ones.
2. Number of Inclusions
Multiple inclusions can affect the overall clarity grade.
3. Location
An inclusion located in the center of the diamond is often more noticeable than one near the edge.
4. Relief
Relief measures how much an inclusion contrasts against the surrounding diamond.
5. Nature of Inclusion
Certain inclusions affect clarity more than others.
Do Lab-Grown Diamonds Have Better Clarity Than Natural Diamonds?
In many cases, yes.
Because lab-grown diamonds are created in controlled environments, manufacturers can minimize the formation of inclusions.
Benefits include:
- Higher average clarity
- More eye-clean options
- Better value for money
- Greater consistency in quality
However, not every lab-grown diamond has perfect clarity. Each stone must still be individually graded.
Common Inclusions Found in Lab-Grown Diamonds
Lab diamonds can contain unique inclusions depending on the growth process.
CVD Diamond Inclusions
Chemical Vapor Deposition (CVD) diamonds may contain:
- Graphite inclusions
- Pinpoints
- Growth lines
- Internal strain patterns
HPHT Diamond Inclusions
High Pressure High Temperature (HPHT) diamonds may contain:
- Metallic inclusions
- Flux remnants
- Crystal inclusions
These inclusions are often microscopic and do not affect beauty.
Which Lab Diamond Clarity Grade Offers the Best Value?
For most buyers, VS1 and VS2 clarity grades provide the best combination of beauty and affordability.
Why VS Clarity Is Popular
- Eye-clean appearance
- Excellent brilliance
- Lower price than VVS diamonds
- Suitable for engagement rings and fine jewelry
Many gemologists recommend VS1 or VS2 because the difference between VS and VVS is usually impossible to see without magnification.
Is Flawless Clarity Worth the Extra Cost?
Not always.
Although flawless diamonds are prestigious, most buyers cannot visually distinguish an FL diamond from a VS1 or VVS2 diamond.
Consider these points:
- The price difference can be substantial.
- Visual differences are minimal.
- Savings can be allocated toward larger carat weight or better color.
For practical buyers, VS1, VS2, or VVS2 often provide the best overall value.
Clarity and Diamond Shape
Different diamond shapes reveal inclusions differently.
Round Brilliant Diamonds
- Best at hiding inclusions
- Strong sparkle masks imperfections
Oval Diamonds
- Good inclusion concealment
- Popular for engagement rings
Cushion Diamonds
- Excellent at hiding inclusions
Emerald Cut Diamonds
- More transparent
- Clarity becomes more important
Asscher Cut Diamonds
- Step-cut facets expose imperfections
- Higher clarity recommended
Recommended Clarity Grades by Shape
| Shape | Recommended Clarity |
| Round | VS2 or higher |
| Oval | VS2 or higher |
| Cushion | SI1 or higher |
| Princess | VS2 or higher |
| Emerald | VS1 or higher |
| Asscher | VS1 or higher |
| Pear | VS2 or higher |
| Radiant | VS2 or higher |
Real-Life Example
Imagine two 2-carat lab-grown diamonds:
Diamond A
- VVS1 Clarity
- D Color
- Higher price
Diamond B
- VS1 Clarity
- D Color
- Lower price
To the naked eye, both diamonds may appear identical.
Most buyers would never notice the difference without magnification. Choosing the VS1 diamond could save hundreds or even thousands of dollars.
How to Choose the Right Lab Diamond Clarity Grade
Follow these simple steps:
Step 1: Set Your Budget
Determine how much you’re willing to spend before comparing clarity grades.
Step 2: Prioritize Eye-Clean Appearance
Choose a diamond that appears clean without magnification.
Step 3: Consider Diamond Shape
Step-cut diamonds require higher clarity grades.
Step 4: Review Certification
Always purchase diamonds with reputable grading reports.
Step 5: Compare Multiple Diamonds
Compare diamonds side by side to identify the best value.
Lab Diamond Clarity Grades vs Natural Diamond Clarity Grades
The grading scale is exactly the same.
Differences include:
| Feature | Lab Diamonds | Natural Diamonds |
| Grading Scale | Same | Same |
| Clarity Standards | Same | Same |
| Average Clarity | Often Higher | Often Lower |
| Price | Lower | Higher |
This allows buyers to obtain higher clarity diamonds at more accessible price points.
Why Clarity Matters in Diamond Buying
Clarity influences:
- Appearance
- Sparkle
- Value
- Rarity
- Long-term satisfaction
However, clarity should be balanced with the other 4Cs:
- Cut
- Color
- Clarity
- Carat Weight
A well-balanced diamond often provides better value than focusing exclusively on clarity.
Conclusion
Understanding lab diamond clarity grades is essential when selecting the perfect diamond. Clarity measures the visibility of inclusions and blemishes, helping buyers evaluate a diamond’s purity and overall appearance. While flawless and internally flawless diamonds represent the highest clarity levels, they are not always necessary for achieving exceptional beauty.
For most buyers, VS1 and VS2 clarity grades provide the ideal balance between visual perfection and affordability. These diamonds typically appear eye-clean while offering significant savings compared to higher clarity options. Additionally, lab-grown diamonds often deliver better clarity value than natural diamonds because they are created under controlled conditions.
When shopping for a lab-grown diamond, focus on finding a stone that looks beautiful to the naked eye rather than paying extra for microscopic differences. By understanding clarity grades and how they affect value, you can confidently choose a diamond that meets your style, budget, and long-term expectations.
FAQs About Lab Diamond Clarity Grades
1. What is the best clarity grade for a lab-grown diamond?
VS1 and VS2 are generally considered the best value because they appear eye-clean while remaining affordable.
2. Are lab-grown diamonds flawless?
Some lab-grown diamonds can be flawless, but most contain tiny inclusions just like natural diamonds.
3. Is VS2 clarity good enough?
Yes. Most VS2 diamonds are eye-clean and offer excellent value.
4. Can you see inclusions in a VVS diamond?
Typically no. VVS inclusions are extremely difficult to detect even under magnification.
5. Does clarity affect sparkle?
Severe inclusions can reduce sparkle, but most VS and VVS diamonds show exceptional brilliance.
6. Which clarity grade is best for an engagement ring?
VS1 or VS2 clarity is ideal for most engagement rings.
7. Are SI1 lab diamonds worth buying?
Yes, provided the diamond is eye-clean and inclusions are not visible without magnification.
8. Do IGI and GIA use the same clarity grades?
Yes. Both laboratories use the industry-standard clarity grading scale.
