Diamond Clarity Guide

Diamond clarity is one of the most important factors buyers consider when choosing a diamond.

It describes how clean a diamond looks internally and externally. Most diamonds have tiny natural characteristics called inclusions or blemishes. These can affect the diamond’s appearance, rarity, and price.

However, higher clarity does not always mean a better purchase. Many diamonds have small inclusions that are not visible to the naked eye. That is why understanding diamond clarity helps buyers make a smarter decision instead of overpaying for a grade they may not visually notice.

This guide explains diamond clarity, the clarity scale, how it affects price, and how to choose the right clarity grade for engagement rings, lab-grown diamonds, natural diamonds, and custom jewelry.

Key Takeaways

• Diamond clarity measures the presence of internal inclusions and external blemishes.
• The clarity scale ranges from Flawless to Included.
• Many VS and SI diamonds can look clean to the naked eye.
• Higher clarity usually increases price, but it may not always improve visible beauty.
• Diamond cut has a bigger impact on sparkle than clarity.
• Larger diamonds and step-cut shapes often need higher clarity grades.
• Certification from IGI or GIA helps confirm the diamond’s clarity grade.
• The best clarity grade depends on diamond size, shape, budget, and personal preference.

What Is Diamond Clarity?

Diamond clarity refers to how free a diamond is from inclusions and blemishes.

Inclusions are internal characteristics found inside the diamond. Blemishes are external marks found on the diamond’s surface.

These clarity characteristics can form naturally in natural diamonds or appear during the growth process of lab-grown diamonds.

Most clarity features are very small and can only be seen under magnification. In many cases, they do not affect how beautiful the diamond looks in normal viewing conditions.

Why Diamond Clarity Matters

Diamond clarity matters because it affects appearance, rarity, and price.

A diamond with fewer visible inclusions is usually considered rarer and more valuable. However, the goal for most buyers is not always to buy the highest clarity grade. The smarter goal is to choose a diamond that looks clean to the eye.

This is often called an “eye-clean” diamond.

An eye-clean diamond has no obvious inclusions when viewed without magnification. For many buyers, this offers the best balance between beauty and value.

Diamond Clarity Scale Explained

Diamond clarity is usually graded on a scale from Flawless to Included.

The main clarity grades are:

• FL — Flawless
• IF — Internally Flawless
• VVS1 and VVS2 — Very, Very Slightly Included
• VS1 and VS2 — Very Slightly Included
• SI1 and SI2 — Slightly Included
• I1, I2, and I3 — Included

Each grade describes how visible the inclusions are under 10x magnification and sometimes to the naked eye.

FL: Flawless Diamonds

Flawless diamonds have no visible inclusions or blemishes under 10x magnification. They are extremely rare and usually very expensive.

For most buyers, FL clarity is not necessary unless the goal is rarity, collection value, or a very high-end luxury purchase.

IF: Internally Flawless Diamonds

Internally Flawless diamonds have no visible internal inclusions under 10x magnification, but they may have very minor surface blemishes. IF diamonds are also rare and premium-priced.

They are a strong choice for buyers who want a high-clarity diamond, but they may not offer a visible difference compared to lower clarity grades in everyday wear.

VVS1 and VVS2 Diamonds

VVS stands for Very, Very Slightly Included. VVS diamonds have very tiny inclusions that are difficult to see even under magnification.

These diamonds offer excellent clarity and are popular among buyers who want a premium-quality diamond without paying the extreme price of FL or IF grades.

VVS diamonds are especially useful for larger diamonds and shapes where inclusions may be easier to notice.

VS1 and VS2 Diamonds

VS stands for Very Slightly Included. VS diamonds have minor inclusions that are usually difficult to see without magnification.

For many buyers, VS1 and VS2 offer one of the best balances between appearance and value. They often look clean to the naked eye while costing less than VVS, IF, or FL diamonds.

VS clarity is a strong choice for engagement rings, custom rings, earrings, pendants, and bracelets.

SI1 and SI2 Diamonds

SI stands for Slightly Included. SI diamonds have inclusions that are easier to see under magnification and may sometimes be visible to the naked eye.

Some SI1 diamonds can still look eye-clean, depending on the diamond shape, size, inclusion location, and overall quality.

SI2 diamonds should be reviewed more carefully because inclusions may be more visible or may affect the diamond’s appearance.

If choosing SI clarity, always check the diamond carefully before buying.

I1, I2, and I3 Diamonds

Included diamonds have inclusions that are usually visible to the naked eye. These inclusions may affect beauty, transparency, sparkle, or durability.

I1, I2, and I3 diamonds are usually lower-priced, but they may not be the best choice for high-quality engagement rings or fine custom jewelry.

They may be used in some budget-focused jewelry, but buyers should check them carefully.

Diamond Clarity Chart

Clarity Grade	Meaning	Visibility	Best For
FL	Flawless	No inclusions or blemishes under 10x	Rare luxury diamonds
IF	Internally Flawless	No internal inclusions under 10x	Premium buyers
VVS1	Very, Very Slightly Included	Extremely difficult to see	High-end jewelry
VVS2	Very, Very Slightly Included	Very difficult to see	Premium engagement rings
VS1	Very Slightly Included	Difficult to see under 10x	Excellent value
VS2	Very Slightly Included	Usually eye-clean	Engagement rings and custom jewelry
SI1	Slightly Included	May be eye-clean	Value-focused buyers
SI2	Slightly Included	May be visible	Budget-focused jewelry
I1-I3	Included	Usually visible	Lower-budget jewelry

What Are Diamond Inclusions?

Diamond inclusions are small internal characteristics inside a diamond. They may appear as tiny crystals, clouds, feathers, needles, or other natural marks.

Common inclusion types include:

Feathers

Feathers are small internal fractures or lines within the diamond. Minor feathers may not affect appearance, but larger feathers near the edge should be reviewed carefully.

Clouds

Clouds are groups of tiny inclusions that can make a diamond look hazy if they are heavy. A light cloud may not matter, but strong clouding can reduce brilliance.

Crystals

Crystals are small mineral or diamond crystals trapped inside the diamond. Some are difficult to see, while others may be more noticeable depending on color and location.

Needles

Needles are thin, line-like inclusions. They are often hard to notice unless grouped together or placed in a visible area.

Pinpoints

Pinpoints are tiny dot-like inclusions. They are usually minor and often do not affect the diamond’s appearance.

What Are Diamond Blemishes?

Blemishes are external marks found on the surface of a diamond. They may include scratches, polish lines, abrasions, or small surface marks.

Minor blemishes are common and usually not visible without magnification. In most cases, internal inclusions affect clarity grading more than small surface blemishes.

Eye-Clean Diamonds: What Buyers Should Know

An eye-clean diamond looks clean without magnification.

This is one of the most important concepts for buyers because a diamond does not need to be flawless to look beautiful.

For many engagement rings and custom jewelry pieces, an eye-clean VS2 or SI1 diamond can offer excellent value.

However, eye-clean appearance depends on:

• Diamond size
• Diamond shape
• Inclusion type
• Inclusion location
• Diamond cut
• Lighting conditions
• Viewer’s eyesight

This is why buyers should review diamond details carefully instead of choosing only by clarity grade.

Does Diamond Clarity Affect Sparkle?

Diamond clarity can affect sparkle if inclusions are large, dark, or spread across the stone. However, cut quality usually has a much bigger impact on sparkle.

A well-cut VS2 diamond can look brighter than a poorly cut VVS diamond. When choosing a diamond, do not focus only on clarity. Balance clarity with cut, color, carat, and overall appearance.

Diamond Clarity and Diamond Shape

Diamond shape affects how visible inclusions appear. Some shapes hide inclusions better, while others show them more clearly.

Round Diamonds

Round diamonds hide inclusions well because of their strong brilliance. VS2 or SI1 clarity can often look clean in round diamonds, depending on the stone.

Oval Diamonds

Oval diamonds can hide inclusions reasonably well, but buyers should check the center area carefully. Dark inclusions in the middle may be more noticeable.

Cushion Diamonds

Cushion diamonds can hide inclusions fairly well because of their faceting style. VS2 or SI1 may work well if the diamond looks eye-clean.

Emerald Cut Diamonds

Emerald cut diamonds show inclusions more easily because of their large open facets. For emerald cuts, VS1 or higher is often a safer choice.

Asscher Cut Diamonds

Asscher cut diamonds also have step-cut facets that can make inclusions more visible. A higher clarity grade is usually recommended for a cleaner look.

Pear and Marquise Diamonds

Pear and marquise diamonds may hide inclusions near the pointed ends. However, inclusions in the center or near the surface should be checked carefully.

Best Diamond Clarity for Engagement Rings

For engagement rings, the best clarity grade is usually the one that looks clean to the naked eye.

Good clarity choices include:

• VS1 for premium balance
• VS2 for excellent value
• SI1 for budget-conscious buyers if eye-clean
• VVS for buyers who want higher clarity and rarity

For larger center stones or step-cut shapes like emerald and Asscher, choosing a higher clarity grade may be worth it.

For round, oval, cushion, or radiant diamonds, buyers may find excellent value in VS2 or eye-clean SI1 diamonds.

Best Diamond Clarity for Lab-Grown Diamonds

Lab-grown diamonds are graded using the same clarity scale as natural diamonds.

They can have inclusions, growth marks, or internal characteristics, just like natural diamonds.

For lab-grown diamonds, buyers often choose higher clarity grades because lab-grown diamonds usually offer better value compared to natural diamonds.

Popular clarity choices for lab-grown diamonds include:

• VS2
• VS1
• VVS2
• VVS1

For custom lab-grown diamond jewelry, VS and VVS grades are often strong choices because they offer clean appearance and premium value.

Best Diamond Clarity for Different Jewelry Types

The right clarity grade also depends on the jewelry type.

Engagement Rings

Engagement rings usually need better clarity because the center stone is highly visible. VS1, VS2, or eye-clean SI1 can work well depending on shape and size.

Earrings

Diamond earrings are viewed from a distance, so extremely high clarity is often not necessary. VS2 or SI1 can offer good value if the diamonds look well matched.

Pendants

Pendants are also viewed from a normal distance. Eye-clean clarity is usually more important than choosing the highest grade.

Bracelets

Bracelets often use multiple smaller diamonds. Consistency matters more than very high clarity for each stone.

Men’s Rings

Men’s rings may use larger or darker design elements. VS and SI clarity can work well depending on diamond placement and style.

Diamond Clarity vs Diamond Color

Clarity and color both affect diamond value, but they influence appearance differently.

Clarity deals with internal and external marks. Color deals with how white or warm the diamond appears.

If the diamond is eye-clean, it may be smarter to spend more on cut quality or color instead of paying extra for a higher clarity grade.

For example, a VS2 diamond with excellent cut may be a better purchase than a VVS diamond with average cut.

Diamond Clarity vs Diamond Cut

Diamond cut affects sparkle, brilliance, and light performance. Diamond clarity affects how clean the diamond appears.

If you have to choose where to spend more, cut quality usually deserves priority because it has the biggest effect on beauty.

A clean diamond with poor cut may look dull. A well-cut diamond with small invisible inclusions can look bright and beautiful.

Diamond Clarity vs Diamond Carat

Carat refers to diamond weight.

As diamonds get larger, inclusions become easier to notice. This means clarity becomes more important for bigger stones.

For smaller diamonds, buyers can often choose slightly lower clarity grades without affecting visible beauty.

For larger diamonds, especially above 1.50 carats, VS clarity or higher may be safer depending on shape and inclusion location.

How Diamond Clarity Affects Price

Higher clarity usually means a higher price.

The price difference can be significant between SI, VS, VVS, IF, and FL grades. However, the visual difference may not always be obvious without magnification.

That is why many buyers choose VS or eye-clean SI diamonds. These grades can offer strong value while still looking beautiful in finished jewelry.

The smartest choice is not always the highest clarity. It is the clarity grade that gives the best balance of appearance, quality, and budget.

How to Read Diamond Clarity on a Certificate

A diamond certificate or grading report helps confirm the clarity grade.

A report may include:

• Diamond clarity grade
• Inclusion map or plot
• Diamond measurements
• Carat weight
• Color grade
• Cut grade
• Polish
• Symmetry
• Laser inscription details

For lab-grown and natural diamonds, certification helps buyers compare stones more confidently.

Common grading reports include IGI and GIA.

Common Mistakes Buyers Make With Diamond Clarity

Paying Too Much for Flawless

Flawless diamonds are rare, but most buyers cannot see the difference without magnification. Unless rarity is the main goal, FL clarity may not be necessary.

Ignoring Eye-Clean Value

A diamond does not need the highest clarity grade to look beautiful. Eye-clean diamonds often provide better value for engagement rings and custom jewelry.

Choosing SI Without Checking Visibility

Some SI diamonds look clean, while others have visible inclusions. Always review inclusion location, size, and appearance before choosing SI clarity.

Forgetting Diamond Shape

Some shapes hide inclusions better than others. Emerald and Asscher cuts usually need higher clarity than round or cushion cuts.

Prioritizing Clarity Over Cut

Cut quality has a stronger impact on sparkle. A high-clarity diamond with poor cut may still look dull.

Expert Tips for Choosing Diamond Clarity

Look for Eye-Clean Diamonds

For most buyers, eye-clean clarity offers the best balance of beauty and value. This allows you to avoid overpaying for clarity that is only visible under magnification.

Prioritize Cut First

Cut affects sparkle more than clarity. Always choose a well-cut diamond before upgrading clarity unnecessarily.

Choose Higher Clarity for Step Cuts

Emerald and Asscher cut diamonds show inclusions more easily. VS1 or higher may be a better choice for these shapes.

Be Careful With Large Diamonds

Inclusions are easier to see in larger diamonds. For bigger stones, review clarity more carefully before buying.

Check the Certificate

A grading report helps confirm the diamond’s clarity grade. This is especially important for engagement rings, lab-grown diamonds, and high-value custom jewelry.

Why Diamond Clarity Matters for Custom Jewelry

Clarity matters in custom jewelry because the diamond is selected before the piece is made. The right clarity grade helps balance beauty, budget, and design goals.

For example:

• A solitaire ring may need a cleaner center stone.
• A tennis bracelet may focus more on consistency across many diamonds.
• A pendant may need an eye-clean stone rather than the highest grade.
• A men’s ring may use diamonds in a setting where minor inclusions are less noticeable.
• Bridal jewelry may need higher clarity for a premium finish.

When designing custom jewelry, clarity should be chosen based on the full design, not the diamond grade alone.

Why Choose Custom Karat for Diamond Jewelry?

Custom Karat helps buyers choose diamonds based on beauty, value, design, and long-term wearability.

With Custom Karat, buyers can create:

• Custom engagement rings
• Diamond rings
• Diamond pendants
• Diamond necklaces
• Diamond bracelets
• Diamond earrings
• Men’s diamond jewelry
• Bridal diamond jewelry

Custom Karat offers lab-grown and natural diamond options, premium metal choices, CAD design previews, transparent pricing, direct manufacturer value, expert craftsmanship, and secure USA shipping.

Instead of choosing only by clarity grade, buyers can create jewelry that balances diamond quality, setting style, metal, craftsmanship, and personal design.

Final Verdict

Diamond clarity is important, but it should not be the only factor in your buying decision.

The best clarity grade is the one that looks clean to the naked eye, fits your budget, and works well with the diamond shape and jewelry design.

For many buyers, VS1, VS2, and eye-clean SI1 diamonds offer excellent value. For larger diamonds or step-cut shapes, higher clarity may be worth considering.

When buying or designing diamond jewelry, balance clarity with cut, color, carat, certification, metal quality, and craftsmanship.

Custom Karat helps buyers create custom diamond jewelry with the right clarity, lab-grown or natural diamond options, CAD approval, premium materials, transparent pricing, and direct manufacturer craftsmanship.

FAQs

What is diamond clarity?

Diamond clarity measures the presence of internal inclusions and external blemishes in a diamond.

What is the best diamond clarity grade?

For many buyers, VS1, VS2, or eye-clean SI1 offers a strong balance of beauty and value.

Is Flawless diamond clarity worth it?

Flawless diamonds are rare and premium-priced, but they are not necessary for most buyers who want a visually beautiful diamond.

What does eye-clean mean?

Eye-clean means the diamond has no obvious inclusions visible to the naked eye.

Does clarity affect diamond sparkle?

Clarity can affect sparkle if inclusions are large or visible, but cut quality has a much bigger impact on sparkle.

Is VS clarity good for engagement rings?

Yes. VS1 and VS2 diamonds are excellent choices for engagement rings because they usually look clean to the naked eye.

Is SI clarity bad?

Not always. Some SI1 diamonds can look eye-clean, but they should be reviewed carefully before buying.

What clarity is best for lab-grown diamonds?

VS2, VS1, VVS2, and VVS1 are popular clarity choices for lab-grown diamonds.

Do earrings need high clarity diamonds?

Not usually. Since earrings are viewed from a distance, eye-clean diamonds are often enough.

Should I choose clarity or cut first?

Cut should usually be prioritized first because it has the strongest impact on sparkle and beauty.