Natural vs Lab-Grown Diamonds: Which Should You Choose?

Quick Answer

Natural and lab-grown diamonds are both composed of crystallised carbon and can offer comparable hardness, brilliance and everyday durability. Their defining difference is origin: natural diamonds form through geological processes within the Earth, while laboratory-grown diamonds are manufactured using HPHT or CVD technology.

Choose a natural diamond if geological rarity, tradition and a longer-established market history matter to you. Choose a lab-grown diamond if you want greater flexibility in size or quality within your initial budget.

Key Takeaways

• Natural and laboratory-grown diamonds share the fundamental properties that make diamond brilliant and durable.

• Natural diamonds form within the Earth, while laboratory-grown diamonds are manufactured using HPHT or CVD technology.

• Their origin normally cannot be identified reliably with the naked eye; specialist testing and independent documentation are important.

• Laboratory-grown diamonds generally provide more size or higher specifications for the initial budget.

• Natural diamonds possess geological rarity and have a longer-established secondary market, but resale value is never guaranteed.

• Neither option is automatically more sustainable. Environmental claims require evidence about energy, production and sourcing.

• The best choice depends on your budget, priorities and whether natural origin holds personal meaning for you.

Choosing an engagement ring now involves more than selecting a shape, carat weight and setting. Many couples must also compare natural vs lab-grown diamonds before deciding which centre stone belongs in their ring.

Both options can create beautiful engagement rings suitable for everyday wear. However, they do not have the same origin, rarity, pricing structure or market history.

Understanding those differences helps you choose according to what genuinely matters to you—not according to the assumption that one type of diamond is universally better.

Natural vs Lab-Grown Diamonds at a Glance

Are Lab-Grown Diamonds Real Diamonds?

Yes. A laboratory-grown diamond is made from crystallised carbon and shares the essential physical and optical properties associated with diamond. However, it is not naturally formed, and its laboratory-grown origin must always be disclosed clearly.

It should not be confused with cubic zirconia, glass or moissanite. Those are different materials that may imitate aspects of a diamond’s appearance.

The defining distinction is origin:

• A natural diamond forms within the Earth.

• A laboratory-grown diamond is manufactured using advanced technology.

According to the Gemological Institute of America, specialist equipment is generally required to identify the growth characteristics that distinguish natural and laboratory-grown diamonds.

How Do Natural Diamonds Form?

Natural diamonds form deep within the Earth under particular combinations of heat and pressure.

They formed across a wide span of Earth’s geological history. Many are more than one billion years old, while the oldest dated examples are approximately 3.5–3.3 billion years old, according to GIA’s diamond-age research.

Some diamond crystals were later transported closer to the surface through volcanic activity, making their recovery possible.

This immense geological history contributes to the rarity and emotional appeal of natural diamonds. For many couples, a stone that existed long before human history gives an engagement ring a particular sense of permanence.

Once recovered, a rough natural diamond must still be planned, cut and polished. Natural origin alone does not guarantee beauty. The cutter’s decisions determine how effectively the finished diamond handles light.

How Are Laboratory-Grown Diamonds Made?

Laboratory-grown diamonds are manufactured using technology that creates the conditions required for diamond crystal growth. A small diamond seed is typically used as the starting point.

Two principal production methods are used.

High Pressure High Temperature

High Pressure High Temperature, or HPHT, uses controlled heat and pressure to grow a diamond crystal around a diamond seed.

Chemical Vapour Deposition

Chemical Vapour Deposition, or CVD, places a diamond seed inside a specialised chamber containing carbon-rich gas. Carbon gradually builds on the seed and forms a diamond crystal.

After it has grown, the rough diamond still needs to be cut and polished. Its final appearance depends on its proportions, symmetry, polish and the skill of the cutter.

A laboratory-grown diamond can therefore be beautifully cut or poorly cut, just like a natural diamond. Origin does not determine visual quality.

Can You See the Difference?

In most cases, a person cannot reliably distinguish a polished natural diamond from a comparable laboratory-grown diamond with the naked eye.

Both types can be colourless or show a visible tint. Both can contain inclusions, and both can produce brightness, fire and scintillation when properly cut.

Professional laboratories use specialist instruments to examine growth patterns, fluorescence and other identifying features.

When comparing diamonds, consider:

• Cut and overall light performance

• Shape and proportions

• Colour

• Clarity

• Carat weight

• Independent grading information

• Appearance under different lighting

• Compatibility with the intended ring setting

Two diamonds with similar report details can still look noticeably different. Seeing suitable options side by side is often more useful than choosing from grades alone.

Do Natural and Lab-Grown Diamonds Sparkle Differently?

Origin does not automatically make one diamond sparkle more than another.

Sparkle is strongly influenced by cut quality. A diamond’s proportions and facet arrangement affect how successfully light enters, moves through and returns from the stone.

A well-cut laboratory-grown diamond can appear more brilliant than a poorly cut natural diamond—and the reverse is equally possible.

When brilliance matters, pay attention to:

• Cut quality

• Proportions

• Symmetry

• Polish

• Light return

• Visible dark or poorly performing areas

For fancy shapes such as oval, pear, marquise, cushion and emerald cuts, the report may not reveal the complete visual character of the stone. An in-person comparison remains valuable.

Are Laboratory-Grown Diamonds as Durable as Natural Diamonds?

Yes. Both possess diamond’s characteristic hardness and are suitable for engagement rings intended for regular wear.

However, hardness does not mean that a diamond is impossible to damage. A sufficiently strong impact can chip either type, particularly around an exposed point, corner or thin edge.

Pear, marquise, princess and heart-shaped diamonds require settings that protect their more vulnerable areas. The claws or prongs holding any centre diamond should also be inspected periodically.

The craftsmanship and security of the setting matter just as much as the diamond’s origin.

Which Costs More: Natural or Lab-Grown Diamonds?

Natural diamonds generally cost more than laboratory-grown diamonds with comparable specifications.

The difference reflects geological rarity, recovery, supply and a longer-established international market. Laboratory-grown diamonds can be manufactured in greater quantities, reducing the influence of natural scarcity on their price.

There is no fixed percentage that describes the price difference for every diamond. Pricing varies according to:

• Carat weight

• Shape

• Cut quality

• Colour

• Clarity

• Supply and production

• Independent documentation

• Current market conditions

A laboratory-grown diamond may allow you to select a larger carat weight, higher colour or clarity grade, or more detailed setting within the same overall budget.

A natural diamond allocates more of that budget to geological origin and rarity.

The fairest comparison starts with one complete budget. Look at what each option provides within that amount rather than comparing diamonds from very different price categories.

Do Natural Diamonds Hold Their Value Better?

Natural diamonds have a longer-established secondary market than laboratory-grown diamonds. Prices for laboratory-grown diamonds have been more changeable as production technology, availability and competition have developed.

However, this does not mean every natural diamond will appreciate or recover its original retail price.

The retail price of an engagement ring includes more than the loose diamond. It can also include:

• Precious metal

• Design and craftsmanship

• Diamond-setting work

• Retail service and aftercare

• Taxes

A future resale offer may depend on the diamond’s specifications, documentation, condition, current demand and the buyer evaluating it.

Neither natural nor laboratory-grown diamonds should be presented as guaranteed investments.

If a longer-established secondary market is important to you, a natural diamond may better fit your priorities. If your focus is obtaining the size and appearance you want at today’s purchase price, a laboratory-grown diamond may provide greater flexibility.

Is a Lab-Grown Diamond Automatically More Sustainable?

No. A laboratory-grown diamond should not automatically be described as sustainable simply because it was not mined.

Its production requires energy, equipment and raw materials. Its environmental impact can vary according to:

• Electricity source

• Production method

• Facility efficiency

• Country of production

• Supply-chain transparency

• Supporting environmental evidence

The impact of natural diamond production also varies between mines, countries, operators and sourcing systems.

CIBJO’s Laboratory-Grown Diamond Guidelines caution against broad environmental terms such as “sustainable”, “green”, “ethical” or “eco-friendly” unless they are supported by credible evidence.

“Laboratory-grown” explains how the diamond was created. It does not provide a complete environmental assessment.

Are Natural and Laboratory-Grown Diamonds Graded Differently?

Natural diamonds can receive independent grading reports. Laboratory-grown diamonds may receive a grading report or quality assessment, depending on the gemmological laboratory.

The document must clearly identify the stone’s natural or laboratory-grown origin.

Terminology and report formats are not identical across all laboratories:

• HRD Antwerp offers laboratory-grown diamond grading reports containing detailed quality information.

• Since 1 October 2025, GIA has used “Premium” and “Standard” quality assessments for eligible laboratory-grown diamonds instead of applying its traditional natural-diamond grading terminology.

Depending on the laboratory and document type, the information may include:

• Measurements

• Carat weight

• Colour grade or quality category

• Clarity

• Cut information

• Polish and symmetry

• Fluorescence

• Report or assessment number

• Diamond origin

Verify the report or assessment number through the issuing laboratory and confirm that the details correspond with the diamond being offered.

Independent documentation helps identify and describe a diamond. It does not guarantee future resale value or prove every environmental claim attached to it.

Which Diamond Should You Choose?

Choose a Natural Diamond If:

• Its geological origin holds emotional significance

• You value natural rarity

• You prefer a traditional engagement-ring choice

• A longer-established market history matters to you

• You want the centre stone to contribute to an heirloom story

• You are comfortable adjusting size or grades to remain within budget

Explore Philippe Harold’s natural diamond engagement rings to compare shapes, settings and proportions.

Choose a Laboratory-Grown Diamond If:

• You want a larger diamond within a defined budget

• You prefer to prioritise colour, clarity or setting details

• Geological rarity is not essential to you

• You appreciate modern diamond-growing technology

• You understand that future market prices may remain changeable

• You want greater flexibility when dividing the budget between the stone and setting

Explore Philippe Harold’s lab-grown diamond engagement rings to compare available designs and specifications.

How to Compare Both Options Fairly

Begin with the same complete budget and preferred diamond shape. Then ask to compare:

1. A natural and laboratory-grown diamond available within that budget.

2. Their visible size, proportions and light performance.

3. Any noticeable differences in colour and clarity.

4. The independent report or assessment for each stone.

5. How each diamond looks in your preferred setting and metal.

Do not assume that the diamond with the highest grades will automatically be the most beautiful to your eye.

A slightly lower colour or clarity grade may provide better overall value if the difference is not visible without magnification. Similarly, a larger diamond is not necessarily more attractive if its proportions and light performance are poor.

Before deciding, ask yourself:

• Does natural geological origin carry special meaning for us?

• Would we prefer rarity or greater size and specification flexibility?

• How important is a longer-established secondary market?

• Which diamond do we prefer when viewing comparable options?

• Does the complete ring remain comfortably within our budget?

A useful consultation should explain these trade-offs clearly without pushing every buyer towards the same type of diamond.

Compare Natural and Lab-Grown Diamonds in Antwerp

Photographs, videos and grading information are useful during initial research, but they cannot reveal every aspect of a diamond’s visual character.

An in-person comparison allows you to evaluate:

• Apparent size

• Brilliance and light return

• Shape and proportions

• Visible colour

• Inclusion placement

• Appearance against different metals

• Suitability for the intended setting

Philippe Harold offers both natural and laboratory-grown diamonds because different clients value different qualities.

With Antwerp heritage dating to 1937, Philippe Harold combines diamond guidance, thoughtful design and personal service. The purpose of a consultation is to help you understand what you are buying and create a ring that reflects your priorities.

Browse the complete engagement-ring collection, explore the bespoke engagement-ring service or book a personal consultation at the Antwerp showroom.

Frequently Asked Questions

Are lab-grown diamonds fake?

No. Laboratory-grown diamonds are made from crystallised carbon and possess the fundamental properties associated with diamond. Their manufactured origin must, however, be clearly disclosed.

Can you tell the difference by looking?

Usually not with the naked eye. Gemmological laboratories use specialist equipment to analyse growth characteristics and confirm whether a diamond is natural or laboratory-grown.

Do lab-grown diamonds sparkle as much as natural diamonds?

They can. Cut quality has a greater effect on visible brilliance and sparkle than the diamond’s origin.

Do lab-grown diamonds become cloudy?

A properly produced laboratory-grown diamond does not become cloudy simply because of its origin. Oils, cosmetics and dirt can coat its surface and temporarily reduce its brilliance, as they can with a natural diamond.

Are lab-grown diamonds always cheaper?

They generally have a lower initial price than natural diamonds with comparable specifications. The exact difference depends on size, shape, quality, supply and current market conditions.

Are both types suitable for everyday wear?

Yes. Both are sufficiently hard for engagement rings and everyday jewellery, although either can chip when struck with enough force.

Do natural diamonds hold their value better?

Natural diamonds have a longer-established secondary market, but this does not guarantee appreciation or recovery of the original retail price.

Can laboratory-grown diamonds receive independent reports?

Yes. Laboratories can provide grading reports or quality assessments for laboratory-grown diamonds. The terminology and information supplied depend on the laboratory.

Are laboratory-grown diamonds always environmentally friendly?

No. Their environmental impact depends on energy sources, production methods, facility efficiency and supply-chain transparency.

Can both types use the same ring settings?

Yes. Natural and laboratory-grown diamonds can be used in solitaire, halo, trilogy, diamond-band and bespoke engagement-ring designs.

Which type is better for an engagement ring?

Neither is universally better. Natural diamonds suit buyers who value geological rarity and tradition, while laboratory-grown diamonds suit buyers prioritising size, specifications or initial budget flexibility.

Where can I compare natural and lab-grown diamonds in Antwerp?

You can compare suitable options during a personal consultation at Philippe Harold’s Antwerp showroom. Viewing them side by side makes differences in size, cut and visual character easier to evaluate.

Final Answer

Natural and laboratory-grown diamonds can both create beautiful and durable engagement rings. A natural diamond offers geological rarity and an ancient origin, while a laboratory-grown diamond provides greater flexibility in size and specifications at the initial purchase price. Set a complete budget, compare well-cut options, verify their independent documentation and choose the diamond whose beauty, origin and value feel right for you.