Lab-Grown Diamond Engagement Ring Comparison: Finding the Right One for You

The right lab-grown diamond engagement ring depends on five primary decisions: diamond shape, cut and light performance, visible size, setting style, and total budget. Start with the shape and setting the wearer prefers, prioritize a bright and well-proportioned diamond, choose a clarity level that looks clean without magnification, and compare millimeter dimensions rather than relying on carat weight alone. Before purchasing, confirm the laboratory-grown origin and verify the diamond report or quality assessment with the issuing laboratory.

A lab-grown diamond is real diamond material created through a controlled manufacturing process rather than mined from the earth. It has essentially the same defining chemical composition, crystal structure, hardness, and optical properties as a natural diamond. Specialized gemological instruments can nevertheless identify its laboratory-grown origin.

How to Compare Lab-Grown Diamond Engagement Rings

A useful ring comparison should consider the complete piece—not only the center diamond. Two rings with the same carat weight can differ substantially in visible size, sparkle, security, comfort, metal quality, maintenance requirements, and total price.

Use this seven-step process:

1. Choose a preferred diamond shape.
2. Compare cut quality and face-up appearance.
3. Select a color and clarity balance.
4. Compare carat weight with millimeter dimensions.
5. Choose a setting suited to the wearer's lifestyle.
6. Compare metal, band construction, and wedding-band fit.
7. Verify the diamond document and retailer policies.

The best ring is not necessarily the one with the largest center stone or highest grades. It is the ring that balances appearance, secure construction, comfort, documentation, price, and personal meaning.

Are Lab-Grown Diamonds Real Diamonds?

Yes. A properly disclosed lab-grown diamond is real diamond material. Natural and laboratory-grown diamonds are primarily composed of carbon arranged in the diamond crystal structure, and both rank 10 on the Mohs hardness scale.

A lab-grown diamond is different from a diamond simulant.

Material What It Is Diamond Material? Important Difference Natural diamond Diamond formed through natural geological processes Yes Natural origin and geological rarity Lab-grown diamond Diamond produced through HPHT or CVD growth Yes Laboratory-grown origin must be clearly disclosed Moissanite A distinct gemstone made from silicon carbide No Different optical behavior, hardness, composition, and sparkle pattern Cubic zirconia A manufactured diamond simulant No Softer, denser, and optically different from diamond

Natural and laboratory-grown diamonds may look alike without specialized equipment. Professional laboratories use growth structures, spectroscopy, fluorescence patterns, and other characteristics to identify origin.

The Federal Trade Commission requires clear disclosure when a diamond is laboratory-grown or laboratory-created so that shoppers are not led to believe it was mined.

CVD vs HPHT Lab-Grown Diamonds

High Pressure High Temperature and Chemical Vapor Deposition are the two principal methods used to create gem-quality laboratory-grown diamonds. Both produce real diamonds.

Factor HPHT CVD Full name High Pressure High Temperature Chemical Vapor Deposition Basic process Carbon crystallizes around a diamond seed under high heat and pressure Carbon atoms from a gas mixture deposit onto a diamond seed in layers Material produced Laboratory-grown diamond Laboratory-grown diamond Possible growth features Metallic inclusions, sector-related growth, or characteristic fluorescence may occur Layered growth, strain, graphite inclusions, or characteristic fluorescence may occur Post-growth treatment May be used to alter color May receive HPHT or another post-growth treatment to alter color Which is better? Neither method is automatically superior. Compare the finished diamond's appearance, treatment disclosure, report, measurements, and price.

Growth method should not replace normal quality evaluation. A well-cut and attractively graded HPHT diamond may be a better purchase than a poorly cut CVD stone, and the reverse can also be true.

Read the complete guide to how HPHT and CVD lab-grown diamonds are made.

Lab-Grown vs Natural Diamond Engagement Rings

Comparison Point Lab-Grown Diamond Ring Natural Diamond Ring Diamond origin Created through controlled manufacturing Formed through natural geological processes Material identity Diamond Diamond Hardness 10 on the Mohs scale 10 on the Mohs scale Visible appearance Depends on cut, color, clarity, size, and setting Depends on cut, color, clarity, size, and setting Price Generally lower for comparable current specifications Generally higher because of natural rarity and market factors Availability Influenced by production capacity and technology Influenced by geological supply and mining Rarity Manufacturing-dependent rather than geologically rare Naturally limited Environmental assessment Depends on energy, facility, cutting, metal, manufacturing, and transportation Depends on mine, processing, metal, manufacturing, and transportation Secondary-market considerations May face limited demand and changing production prices Depends on rarity, quality, brand, condition, and market demand Best suited to Buyers prioritizing visible size, design flexibility, and current purchase value Buyers prioritizing natural origin, geological rarity, and traditional market perception

Neither category is universally better. The appropriate choice depends on the buyer's budget, origin preference, design priorities, documentation expectations, and view of long-term value.

For more detail, read natural vs lab-grown diamonds.

Compare Lab-Grown Diamond Shapes

Diamond shape affects sparkle pattern, face-up size, style, color visibility, clarity visibility, setting options, and how the ring looks on the hand.

Shape Visual Character Main Advantage What to Inspect Good Starting Point For Round Classic and highly brilliant Strong light performance and broad setting availability Cut grade, proportions, symmetry, polish, and diameter Maximum sparkle and traditional style Oval Elongated and elegant Generous finger coverage Bow-tie effect, outline, symmetry, and length-to-width ratio A larger-looking center stone Cushion Soft square or rectangular outline Romantic appearance and varied facet styles Face-up spread, corner shape, light return, and depth Vintage-inspired and halo designs Emerald cut Clean, geometric, and understated Broad flashes of light and elegant proportions Clarity, color, windowing, symmetry, and corner alignment Modern or Art Deco-inspired style Asscher Square step cut with a hall-of-mirrors effect Distinctive geometric appearance Clarity, color, symmetry, and center pattern Vintage geometry and compact proportions Pear Teardrop-shaped and elongated Distinctive outline and visible length Bow-tie, point alignment, shoulders, symmetry, and tip protection A nontraditional elongated look Marquise Long and dramatic Large face-up area for its weight Bow-tie, symmetry, point alignment, and tip protection Maximum visible spread Princess Sharp square outline with strong sparkle Modern geometry and brilliant-style faceting Corner protection, symmetry, depth, and light return A contemporary square shape Radiant Rectangular or square with brilliant faceting Combines geometric outline with lively sparkle Crushed-ice pattern, bow-tie, outline, and dimensions A bright modern rectangular shape

Round Brilliant Diamonds

Round brilliant diamonds are designed to produce strong brightness, fire, and scintillation. They are also the only shape for which GIA provides its established overall cut grade.

When comparing round diamonds, review:

• Cut assessment where provided
• Polish and symmetry
• Table and depth proportions
• Diameter in millimeters
• Face-up brightness
• Dark or uneven patterns

Oval, Pear, and Marquise Diamonds

Elongated shapes may look larger than round diamonds of the same weight because they can cover more of the finger. Their visible size and beauty vary substantially, so compare videos and measurements rather than relying only on a laboratory report.

Pay particular attention to the bow-tie effect, a dark band that may appear across the center of an elongated diamond. A slight bow tie can be normal, while a large and persistent dark area may reduce the stone's liveliness.

Emerald and Asscher Cuts

Step-cut diamonds display broad flashes of light rather than the smaller sparkle pattern associated with round brilliant diamonds. Their open facets make clarity, color, symmetry, and cutting more visible.

A shopper choosing an emerald or Asscher cut may decide to prioritize a cleaner-looking clarity grade, but the diamond should still be evaluated visually rather than selected only by the grade.

Cushion, Princess, and Radiant Cuts

These shapes vary significantly in outline, facet pattern, depth, and visible spread. Compare actual images and video because two diamonds with the same shape and weight may look very different.

For a broader overview, read the engagement-ring shape guide.

How to Balance the 4Cs

The 4Cs—cut, color, clarity, and carat weight—provide a standard framework for comparing diamonds. They should be treated as a system rather than four independent targets.

Cut and Light Performance

Cut and overall proportions strongly influence how bright and lively a diamond appears. A larger diamond with weak cutting may look duller than a slightly smaller stone with better light performance.

For round brilliant diamonds, review the cut assessment together with:

• Polish
• Symmetry
• Proportions
• Face-up pattern
• Brightness
• Fire
• Scintillation

Fancy shapes may not have a universally comparable cut grade. Evaluate videos, dimensions, symmetry, outline, windowing, bow-tie visibility, and face-up appearance.

Color

D-to-Z color grades describe the amount of yellow or brown body color in a white diamond. The appropriate range depends on:

• Diamond shape
• Carat weight
• Metal color
• Side-stone color
• Setting design
• The wearer's color sensitivity

D–F diamonds are colorless, but they are not necessary for every shopper. Near-colorless grades can provide a better balance when the diamond still appears white in the selected setting.

Yellow or rose gold can make slight warmth less noticeable from the face-up view, while white gold or platinum can make color differences easier to see. Step cuts may reveal body color more readily than many brilliant-style cuts.

Clarity

Clarity evaluates internal features and surface characteristics. The most practical goal for many buyers is an eye-clean diamond: a stone whose inclusions are not distracting at normal viewing distance.

Higher clarity grades are not always visibly different without magnification. When comparing diamonds, consider:

• Inclusion type
• Inclusion size
• Location under the table or near the edge
• Whether an inclusion is dark or reflective
• Whether it affects transparency
• Whether it creates a durability concern

Do not automatically assume that VVS is necessary or that every SI diamond will look included. Review the actual stone.

Carat Weight and Face-Up Measurements

Carat measures weight—not visible diameter or finger coverage.

Two one-carat diamonds can look different because of:

• Shape
• Length and width
• Depth
• Girdle thickness
• Cut proportions
• Setting style

Compare the diamond's measurements in millimeters and evaluate how much of its weight is visible from the top. A deeply cut diamond may carry weight below the girdle and appear smaller than another diamond of equal carat weight.

Compare Engagement-Ring Settings

Setting Appearance Main Benefit Trade-Off Best Starting Point For Solitaire Simple and center-stone focused Timeless style and relatively straightforward maintenance The center diamond carries most of the visual impact Classic and minimal preferences Halo Center stone surrounded by smaller accents Adds sparkle and apparent size More accent stones and prongs require maintenance Maximum visual presence Three-stone Center diamond with two side stones Strong finger coverage and symbolic design More complex cleaning and potential wedding-band fit issues Symbolism and wider coverage Bezel Metal surrounds all or part of the diamond edge Strong edge protection and reduced snagging Covers more of the diamond outline Active lifestyles and modern design Low-profile basket Center stone sits closer to the finger Comfort and reduced snagging A straight wedding band may not sit flush Frequent wear and practical comfort Cathedral Band rises to support the center setting Elegant profile and additional visual support Higher structures can be more exposed Traditional elevated styles Vintage-inspired Milgrain, filigree, engraving, or decorative accents Detailed and distinctive character Fine details may need more careful cleaning and repair Romantic and antique-inspired style

Setting height is particularly important. A high setting can create more center-stone visibility and make wedding-band pairing easier, but it may also snag or receive impact more easily. A low-profile ring may feel more practical but can require a curved or contoured wedding band.

Read the guide to low-profile engagement rings for additional comparison points.

Compare Ring Metals

Metal Appearance Advantage Consideration 10K gold Available in white, yellow, or rose tones Higher alloy content can improve hardness and reduce initial price Lower pure-gold content and possible alloy sensitivity 14K gold Balanced gold color and strength Widely used balance of durability, appearance, and price White gold may need periodic rhodium maintenance 18K gold Richer gold appearance Higher pure-gold content Generally softer and more expensive than 14K gold Platinum Naturally white and substantial Does not require rhodium plating and is widely used for fine jewelry Higher price, greater weight, and a distinct patina over time Sterling silver Bright white appearance Lower initial price More tarnish and maintenance; may not suit every buyer's expectations for long-term daily wear

White Gold or Platinum

White metals create a cool, seamless appearance around colorless or near-colorless diamonds. White gold is generally lighter and more accessible, while platinum is naturally white and heavier.

Yellow or Rose Gold

Warm metals can create contrast with the center diamond and may make slight body color less noticeable from the face-up view. White-metal prongs are sometimes used with a yellow- or rose-gold band to reduce visible color reflection around the diamond.

GIA vs IGI Reports for Lab-Grown Diamonds

The term “certificate” is commonly used in shopping, but grading report or quality assessment is often more accurate. Report formats differ by laboratory.

Feature Current GIA Service IGI Lab-Grown Diamond Report Current format Laboratory-Grown Diamond Quality Assessment Laboratory-grown diamond grading report Quality terminology Overall Premium or Standard assessment for qualifying diamonds Familiar carat, color, clarity, and cut information where applicable Origin identification Identifies the diamond as laboratory-grown Identifies the diamond as laboratory-grown Report verification Verify through GIA's official service Verify through IGI's official report-check service Buying implication Do not compare only the laboratory name. Check what the specific document evaluates and confirm that its details match the diamond and product listing.

As of October 1, 2025, GIA's D-to-Z laboratory-grown diamond service uses an overall Premium or Standard assessment rather than the full natural-diamond color and clarity nomenclature. IGI continues to provide 4Cs-based documentation for laboratory-grown diamonds.

Before buying:

1. Locate the report or assessment number.
2. Use the issuing laboratory's official verification service.
3. Confirm laboratory-grown origin.
4. Match the shape and carat weight.
5. Match the length, width, and depth measurements.
6. Compare color, clarity, cut, or assessment information as applicable.
7. Check for comments about treatment or growth method.
8. Confirm any girdle inscription when stated.
9. Ask the seller about any mismatch before purchasing.

Explore IGI-certified lab-grown diamonds where available.

How Much Should a Lab-Grown Diamond Engagement Ring Cost?

Lab-grown diamonds are generally priced below comparable natural diamonds, but there is no reliable universal savings percentage or permanent one-carat price.

The cost of a complete engagement ring depends on:

• Diamond shape
• Carat weight
• Face-up dimensions
• Color
• Clarity
• Cut and proportions
• Growth method
• Post-growth treatment
• Report or assessment provider
• Metal type and purity
• Accent-stone number and quality
• Setting complexity
• Customization
• Craftsmanship
• Warranty, return, resizing, and service policies

A larger diamond is not automatically a better value. A deep diamond may carry extra weight that is not visible from the top, while a weaker cut can reduce brightness.

How to Allocate a Fixed Budget

A practical order of priorities is:

1. Choose a secure and well-made setting.
2. Prioritize diamond cut and face-up appearance.
3. Select a color that appears white enough in the chosen metal.
4. Select an eye-clean clarity level.
5. Use the remaining budget to increase visible size or add design details.

This approach usually provides a better visual result than automatically maximizing carat weight or purchasing the highest available color and clarity grades.

Are Lab-Grown Diamond Rings More Sustainable?

A lab-grown diamond avoids the direct excavation required to mine that particular center stone. Its complete environmental impact, however, depends on more than laboratory origin.

Relevant factors include:

• Electricity source
• Energy required by the growth method
• Production efficiency
• Carbon feedstock
• Cooling and facility operations
• Cutting and polishing
• Gold or platinum sourcing
• Accent-stone sourcing
• Manufacturing location
• Packaging and transportation
• Repairability and expected jewelry lifespan

Laboratory-grown origin alone does not prove that a ring is carbon-neutral, conflict-free, ethical, or environmentally superior in every category.

Buyers who prioritize environmental and labor considerations can ask for:

• Producer-specific energy information
• Independent environmental certification where available
• Specific emissions or renewable-energy disclosures
• Recycled or responsibly sourced metal information
• Accent-stone origin information
• Manufacturing and supplier disclosures
• Repair, warranty, and long-term service policies

Broad terms such as “green,” “eco-friendly,” “zero impact,” and “ethical” should be supported by specific evidence.

Compare Rings by Lifestyle and Priority

Buyer Priority Recommended Starting Point Why It Works Trade-Off to Review Maximum sparkle Well-cut round brilliant solitaire Round brilliant faceting is designed for strong light return May have a higher price per carat than some fancy shapes Larger visible spread Oval, pear, or marquise Elongated outlines can cover more of the finger Inspect bow-tie, symmetry, and point protection Active lifestyle Low-profile bezel or secure basket Reduced snagging and greater edge protection May require a curved wedding band Modern minimalism Emerald cut or bezel solitaire Clean lines and reduced visual complexity Step cuts reveal clarity and color more readily Maximum apparent size Halo setting with an elongated center Adds surrounding sparkle and finger coverage More small stones and prongs require maintenance Vintage character Cushion, Asscher, or milgrain halo Supports decorative and period-inspired detailing Intricate details need more careful cleaning Simple maintenance Solitaire or plain bezel Fewer accent stones and decorative elements Less additional sparkle or visual detail Balanced budget Near-colorless, eye-clean diamond with strong cutting Allocates more budget to visible performance Requires visual comparison rather than selecting the highest grades

Online Buying and Report-Verification Checklist

For additional online-purchase guidance, read tips for buying lab-grown diamond engagement rings online.

How to Clean and Care for a Lab-Grown Diamond Ring

Lab-grown and natural diamonds require the same general cleaning and setting maintenance. Diamond is highly scratch-resistant, but it can still chip after a severe impact, and the surrounding metal or prongs can wear over time.

Basic Cleaning Method

1. Place lukewarm water and a small amount of mild soap in a clean bowl.
2. Allow the ring to soak briefly when its setting and accent stones permit it.
3. Use a very soft brush around the diamond, prongs, gallery, and lower setting.
4. Rinse carefully with lukewarm water.
5. Dry with a lint-free cloth.

Everyday Protection

• Remove the ring before weight training or heavy manual work.
• Avoid striking the diamond or setting against hard surfaces.
• Remove the ring before using harsh household chemicals.
• Store it separately from other jewelry.
• Have the prongs and setting inspected periodically.
• Do not attempt to tighten a loose stone at home.

Diamond attracts oils and may look dull when lotion, soap, cosmetics, or skin oils accumulate on its surface. Regular gentle cleaning restores appearance; the diamond does not lose its inherent optical properties because it is laboratory-grown.

Do Lab-Grown Diamond Engagement Rings Hold Their Value?

A lab-grown diamond engagement ring should generally be purchased for wear, design, and personal meaning rather than guaranteed financial appreciation.

Possible resale value depends on:

• Current secondary-market demand
• Metal value
• Accent stones
• Craftsmanship
• Condition
• Brand recognition
• Report or assessment
• Design appeal
• Changes in manufacturing supply
• Changes in current retail prices

The fact that a ring cost less initially does not guarantee that it represents a better financial investment. Natural and laboratory-grown diamond jewelry can both resell below their original retail price.

A ring may still become an emotionally valuable heirloom even when its future market price is uncertain. Sentimental value and resale value are separate considerations.

Which Lab-Grown Diamond Engagement Ring Is Right for You?

Choose a lab-grown diamond ring when you value real diamond material, design flexibility, and greater current purchase accessibility more than natural geological rarity.

A strong final selection should provide:

• A shape the wearer genuinely likes
• Good light performance
• A color that works with the chosen metal
• Clarity that appears clean at normal viewing distance
• Face-up dimensions appropriate to the desired look
• A secure and comfortable setting
• A metal suited to the intended wear
• Clear laboratory-grown disclosure
• A verifiable report or assessment
• Transparent return, resizing, shipping, and warranty terms

The right ring is not defined by one carat weight, one laboratory, one grade, or one setting. It is the combination that best fits the wearer's style, activities, comfort, and the couple's complete budget.

Frequently Asked Questions

Are lab-grown diamonds real diamonds?

Yes. Lab-grown diamonds are real diamond material with essentially the same defining chemical composition, crystal structure, hardness, and optical properties as natural diamonds. Their laboratory-grown origin can be identified using specialized testing.

Is a lab-grown diamond the same as moissanite?

No. Lab-grown diamond is crystallized carbon, while moissanite is silicon carbide. They differ in composition, optical behavior, hardness, sparkle pattern, price, and identification.

Is CVD or HPHT better for an engagement ring?

Neither method is automatically better. Compare the finished diamond's cut, appearance, color, clarity, treatment disclosure, measurements, report, and price rather than choosing only by growth method.

Can a jeweler identify a lab-grown diamond by sight?

Usually not through ordinary visual inspection alone. Professional laboratories use specialized instruments, spectroscopy, fluorescence, growth features, and other characteristics to determine origin.

Which diamond shape has the most sparkle?

A well-cut round brilliant is designed for strong brightness, fire, and scintillation. Other shapes can also be lively, but their sparkle patterns, proportions, and visual character differ.

Which diamond shapes look largest?

Oval, pear, marquise, and some elongated cushion or radiant shapes may provide greater finger coverage for their weight. Compare millimeter dimensions because two diamonds with the same carat weight can face up differently.

What is the bow-tie effect in a diamond?

The bow-tie effect is a dark band that can appear across the center of oval, pear, marquise, and some other elongated diamonds. A slight bow tie may be normal, while a large dark area can reduce visible brightness.

What diamond color offers the best value?

There is no single best grade. A near-colorless diamond that appears white in the selected metal may provide a more practical balance than automatically choosing a colorless D–F grade.

What clarity grade should I choose?

Choose a diamond that appears clean at normal viewing distance and whose inclusions do not create transparency or durability concerns. The best choice depends on inclusion type, size, location, diamond shape, and personal sensitivity.

Is carat weight the same as visible size?

No. Carat measures weight. Visible size depends on the diamond's shape, length, width, depth, proportions, and how much weight is carried below the girdle.

Does GIA still use D-to-Z color and clarity grades for lab-grown diamonds?

GIA's current D-to-Z laboratory-grown diamond service uses an overall Premium or Standard quality assessment for qualifying stones rather than the full natural-diamond color and clarity nomenclature. Always review the exact document supplied.

Does IGI grade lab-grown diamonds using the 4Cs?

IGI continues to issue laboratory-grown diamond reports with familiar carat, color, clarity, and cut information where applicable. Verify the report number and match its specifications to the product listing.

Is GIA or IGI better for a lab-grown diamond?

The laboratories currently present lab-grown diamond information differently. Instead of choosing only by laboratory name, check what the specific report or assessment evaluates, verify it online, and confirm that it matches the diamond.

How do I verify a lab-grown diamond report?

Enter the report number into the issuing laboratory's official verification service. Match the origin, shape, weight, measurements, quality information, comments, and inscription details to the diamond listing.

What setting is best for an active lifestyle?

A low-profile bezel, partial bezel, or secure basket can reduce snagging and protect more of the diamond edge. The best option also depends on comfort and wedding-band pairing.

Which setting makes a diamond look larger?

Halo, cluster, and some illusion-style settings can increase apparent size. An elongated diamond shape can also provide greater visible finger coverage without changing the carat weight.

How much cheaper are lab-grown diamonds?

They are generally priced below comparable natural diamonds, but no universal percentage applies. The difference changes with market supply, shape, size, color, clarity, cut, report, setting, and retailer.

Are lab-grown diamonds automatically sustainable?

No. Laboratory growth avoids directly mining that center stone, but total impact depends on electricity, production efficiency, cutting, metal sourcing, manufacturing, packaging, and transportation.

Can a lab-grown diamond engagement ring be insured?

Many insurers cover lab-grown diamond jewelry, but terms differ. Keep the purchase receipt, product specifications, appraisal where relevant, and laboratory document, and ask how replacement value will be calculated.

Do lab-grown diamonds lose their sparkle?

They do not lose their diamond optical properties because of laboratory origin. A ring can look dull when oil, lotion, soap, or debris builds up, so regular gentle cleaning is important.

Do lab-grown diamond engagement rings retain value?

Future value is not guaranteed. Resale depends on metal, condition, craftsmanship, brand, documentation, design demand, secondary-market interest, and changes in laboratory-grown diamond supply and pricing.

Compare Before You Commit

A lab-grown diamond engagement ring can provide real diamond brilliance, durability, and broad design flexibility. The strongest purchase is not simply the largest diamond available within the budget. It is the ring that combines attractive light performance, appropriate visible size, secure construction, comfortable wear, clear documentation, and reliable retailer policies.

Compare the diamond and the complete ring together. Check the shape, measurements, 4Cs, setting, metal, report, treatment disclosure, wedding-band fit, resizing options, returns, warranty, and insured shipping before placing the order.

Related Diamond and Engagement-Ring Guides

• Tips for Buying Lab-Grown Diamond Engagement Rings Online
• How Are Lab-Grown Diamonds Made Using HPHT and CVD?
• Natural vs Lab-Grown Diamonds
• How to Choose an Engagement-Ring Shape
• Low-Profile Engagement Rings: Styles, Benefits, and Trade-Offs
• Is It Worth Buying a Lab-Grown Diamond?

Expert Resources

• GIA: Updated Laboratory-Grown Diamond Quality Assessment
• GIA: Natural and Laboratory-Grown Diamond Identification
• IGI: Laboratory-Grown Diamond Reports
• IGI: Understanding the Diamond 4Cs
• FTC: Advertising Diamonds, Gemstones, and Pearls
• FTC: Diamond Advertising and Environmental Claims