Lab grown and natural diamonds may have very different origins, but both are diamonds. They share essentially the same chemical composition, crystal structure, physical properties and optical properties. To the unaided eye, a high-quality lab grown diamond can look the same as a comparable natural diamond.
The biggest differences are where they come from, how long they take to form, their price and how the market values them.
For engagement ring shoppers, that distinction creates a meaningful choice. A natural diamond offers the rarity and geological history of a stone formed within the Earth. A lab grown diamond can offer the beauty, brilliance and durability expected from a diamond while making larger carat weights, higher specifications and more elaborate ring designs accessible at a lower purchase price.
For many couples, that makes lab grown diamond engagement rings particularly compelling: more of the budget can go toward the diamond size, shape and setting that actually determine how the finished ring looks on the finger.
Lab Grown vs Natural Diamonds at a Glance
| Lab Grown Diamond | Natural Diamond | |
|---|---|---|
| Is it a real diamond? | Yes | Yes |
| Composition | Crystallized carbon | Crystallized carbon |
| Appearance | Can appear identical to the unaided eye | Can appear identical to the unaided eye |
| Hardness | 10 on the Mohs scale | 10 on the Mohs scale |
| Common grading factors | Cut, color, clarity and carat | Cut, color, clarity and carat |
| Origin | Created under controlled conditions | Formed naturally within the Earth |
| Typical formation time | Weeks | Millions to billions of years |
| Price | Generally substantially less expensive | Generally substantially more expensive |
| Best suited for | Buyers prioritizing size, specifications, design and purchase-price value | Buyers prioritizing natural origin, rarity and geological history |
Are Lab Grown Diamonds Real Diamonds?
Yes.
A lab grown diamond is not cubic zirconia, glass or moissanite. Those materials can imitate aspects of a diamond's appearance, but they are different substances.
Lab grown diamonds have essentially the same chemical composition and crystal structure as natural diamonds. Both consist of carbon atoms arranged in the characteristic diamond crystal structure.
That means a lab grown diamond possesses the optical and physical characteristics people associate with diamonds: brilliance, fire and exceptional hardness.
The distinction is therefore lab grown diamond versus natural diamond, not real diamond versus fake diamond.
Moissanite is a separate gemstone made from silicon carbide. If you're considering both options for an engagement ring, our Moissanite vs Diamond Comparison Guide explains the differences in appearance, sparkle, composition, durability and price.
How Are Natural Diamonds Formed?
Natural diamonds formed deep within the Earth under tremendous heat and pressure.
Carbon crystallized into diamond over geological timescales, and some of those diamonds were eventually carried closer to the Earth's surface through volcanic activity.
This extraordinary natural history is a significant part of the appeal of natural diamonds. A natural diamond isn't valued simply because it sparkles; buyers may also value its rarity, geological origin and age.
For someone who wants an engagement ring containing a naturally formed gemstone with that history, those characteristics can matter independently of how the finished diamond looks.
How Are Lab Grown Diamonds Made?
Lab grown diamonds use technology to create conditions in which carbon can crystallize as diamond.
Two primary methods are used.
HPHT Diamonds
High Pressure High Temperature (HPHT) growth recreates high-pressure and high-temperature conditions that allow carbon to crystallize around a diamond seed.
CVD Diamonds
Chemical Vapor Deposition (CVD) uses a different process. A diamond seed is placed inside a controlled chamber containing carbon-rich gas. Carbon accumulates on the seed and gradually forms diamond crystal.
Both processes produce actual diamond material.
The different growth environments can leave microscopic characteristics that trained laboratories use to determine whether a diamond is natural or laboratory grown, but these generally aren't characteristics an engagement ring shopper can identify simply by looking at the finished stone.
Can You Tell a Lab Grown Diamond From a Natural Diamond?
Usually not with your eyes alone.
A well-cut lab grown diamond and a comparable natural diamond can look essentially the same without specialized equipment. Both can display exceptional brilliance, fire and scintillation.
The difference in origin can, however, be identified by qualified gemological laboratories using specialized testing equipment.
This is one reason reputable grading and accurate product disclosure matter. You shouldn't have to guess whether the diamond you're buying is natural or laboratory grown.
Do Lab Grown Diamonds Sparkle Like Natural Diamonds?
Yes.
A diamond's visual performance is influenced much more directly by characteristics such as its cut, proportions, shape, polish and symmetry than by whether the crystal grew underground or in a laboratory.
A beautifully cut lab grown diamond can be exceptionally brilliant. A poorly proportioned diamond can appear less lively regardless of its origin.
This becomes particularly important when choosing a diamond shape. A round lab grown diamond engagement ring emphasizes the symmetry and light return of the round brilliant cut, while elongated shapes such as oval, radiant, pear and marquise can provide greater visual coverage along the finger.
For a more architectural appearance, emerald cut lab grown diamond engagement rings use broad step facets rather than brilliant-style faceting. Cushion and elongated cushion diamonds offer softer corners, while princess cut lab diamonds create a distinctly square, geometric appearance.
Origin doesn't determine which of these shapes will look best. Shape, proportions and the quality of the individual diamond matter much more to the finished appearance.
Lab Grown vs Natural Diamond: The 4Cs
The familiar 4Cs—cut, color, clarity and carat—apply to both lab grown and natural diamonds.
Cut
Cut determines how effectively a faceted diamond interacts with light.
For round brilliant diamonds in particular, cut quality can have an enormous influence on brightness, fire and scintillation.
For fancy shapes such as oval, emerald, radiant, pear and marquise diamonds, shoppers should also pay attention to proportions, dimensions, symmetry and the actual face-up appearance of the individual stone.
Color
Diamond color grades evaluate the amount of visible body color within a diamond.
Many engagement ring buyers prefer colorless or near-colorless diamonds, although the ideal grade can depend on the diamond's shape, size and the metal color of the ring.
Clarity
Clarity evaluates internal characteristics known as inclusions and external characteristics known as blemishes.
Higher clarity grades indicate fewer or less noticeable clarity characteristics, but higher isn't automatically better for every buyer.
Once inclusions aren't distracting to the unaided eye, spending significantly more for an extremely high clarity grade may provide little visible difference in an engagement ring.
Carat
Carat measures weight, not physical dimensions.
Two diamonds with the same carat weight can have different visible dimensions depending on their shape and proportions. This is especially relevant when comparing elongated shapes such as oval, radiant, pear, emerald and marquise diamonds.
That's why it helps to compare both carat weight and millimeter measurements rather than relying on the carat number alone.
Gema&Co's Lab Diamond collection can also be browsed directly by center-stone size: 1 carat, 2 carat, 3 carat, 4 carat, and 5 carat and larger lab grown diamond engagement rings.
Comparing rings this way makes it easier to see how shape and proportions change the visual presence of diamonds within the same general weight range.
Lab Grown vs Natural Diamond Prices
Price is one of the largest practical differences between the two.
Lab grown diamonds generally cost substantially less than natural diamonds with comparable characteristics.
For engagement ring buyers, that can completely change what's possible within a particular budget.
Instead of choosing between the diamond size you want and the ring design you want, a lab grown diamond may allow more of the budget to go toward:
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A larger center diamond
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Higher color or clarity
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A preferred diamond shape
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A more elaborate setting
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Pavé or accent diamonds
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A three-stone design
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A halo or hidden halo
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A distinctive two-stone Toi Et Moi design
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Platinum or a preferred gold color
That flexibility is one of the biggest practical advantages of lab grown diamonds.
At Gema&Co, we think the finished ring matters more than chasing a specification on a grading report simply because the number is higher. The center diamond, its proportions, the setting, precious metal and overall design all contribute to how an engagement ring actually looks.
Choosing a Lab Grown Diamond Setting
A lower center-stone cost also gives buyers more freedom to choose the setting they actually want rather than allocating most of the budget to the diamond alone.
A lab grown diamond solitaire engagement ring keeps the center diamond as the clear focal point and works particularly well when shape or carat size is the priority.
For more brilliance, pavé lab grown diamond engagement rings add smaller diamonds along the band.
A halo lab diamond engagement ring surrounds the center stone with smaller diamonds, creating additional sparkle and visual presence. A hidden halo lab diamond ring moves that accent detail beneath the center stone so it becomes more noticeable from the side.
For a cleaner, more contemporary look, bezel lab grown diamond engagement rings surround the center stone with a precise rim of precious metal.
Multi-stone designs create an entirely different visual effect. Three-stone lab grown diamond engagement rings add width and additional diamond presence across the finger, while Toi Et Moi designs pair two center stones for a more distinctive asymmetrical composition.
The best setting isn't determined by whether the diamond is lab grown or natural. It's the setting that best complements the diamond shape, proportions and the way you want the finished ring to look.
Does a Lab Grown Diamond Look Cheaper?
No inherent visual characteristic makes a lab grown diamond look cheap.
Origin isn't a diamond cut grade.
A beautifully proportioned lab grown diamond in a well-made setting can look exceptional, just as an unattractive natural diamond doesn't become beautiful simply because it formed underground.
What you actually see when looking at an engagement ring is the combination of the stone's shape, proportions, brilliance and size with the design and craftsmanship of the setting.
This is why comparing actual rings and diamond specifications is more useful than treating origin as a measure of appearance.
Are Lab Grown Diamonds as Durable as Natural Diamonds?
Yes. Both are diamond and have the exceptional hardness associated with diamond.
Diamond ranks 10 on the Mohs hardness scale, making both lab grown and natural diamonds highly resistant to scratching and well suited to jewelry intended for everyday wear.
Hardness does not mean indestructibility, however.
Any diamond can chip if struck at a vulnerable point or with sufficient force. Certain shapes have areas that deserve additional protection—for example, the pointed tip of a pear or the ends of a marquise diamond.
The design of the setting, prongs and overall construction of an engagement ring therefore still matters regardless of diamond origin.
A bezel can be particularly appealing to shoppers who prefer additional metal coverage around the perimeter of the center stone, while traditional prong settings expose more of the diamond.
Lab Grown Diamond Certification and Grading
Independent grading can document important characteristics of a diamond, including measurements and the 4Cs.
Organizations such as the International Gemological Institute (IGI) evaluate lab grown diamonds and identify their laboratory-grown origin on their reports.
At Gema&Co, lab grown diamonds 1.00 carat and larger are IGI graded. Diamonds 0.99 carat and below are not individually graded.
A grading report is useful information, but it shouldn't replace evaluating the diamond itself.
Two diamonds with similar grades can still look different because of proportions, facet pattern, measurements and other characteristics. Think of the grading report as an important set of specifications—not a beauty score.
For additional answers about Gema&Co diamonds, grading, customization, sizing, shipping and ring care, visit our Frequently Asked Questions.
Do Lab Grown Diamonds Hold Their Value?
This is one area where shoppers should have realistic expectations.
A diamond engagement ring generally shouldn't be treated as a financial investment with an assumed future return.
Lab grown diamond prices have changed substantially as production technology and supply have expanded. Natural diamonds also typically sell on the secondary market for less than their original retail purchase price, although natural and lab grown diamonds operate in different resale markets.
If future resale value is an important part of your decision, research the current secondary market before purchasing rather than assuming either type of diamond will appreciate.
For many engagement ring buyers, the more useful question is:
How much ring do I want for the money I'm spending today?
If maximizing diamond size, specifications or setting design within a budget is the priority, lab grown diamonds can be particularly attractive.
If natural rarity and geological origin are themselves part of what you value, the additional cost of a natural diamond may be worthwhile to you.
Are Lab Grown Diamonds More Ethical or Sustainable?
This question deserves more nuance than many jewelry advertisements give it.
Lab grown diamonds avoid the mining required to recover natural diamonds, but producing diamonds in a laboratory still requires energy, equipment and industrial infrastructure. Environmental impact can vary according to the production method, energy source and manufacturer.
Natural diamond production also varies substantially by mine, region and operator.
For that reason, broad statements that every lab grown diamond is automatically eco-friendly or that every natural diamond has the same environmental impact oversimplify the comparison.
If environmental impact is an important part of your purchase, look for specific information about sourcing and production rather than relying solely on the words lab grown or natural.
Lab Grown vs Natural Diamonds for Engagement Rings
Both can make exceptional engagement rings.
The better choice depends on what you value.
Consider a Lab Grown Diamond If:
You want to prioritize diamond size, specifications and ring design for your budget.
The lower purchase price can make larger center stones and more elaborate settings attainable without sacrificing the fundamental properties that make diamond such a desirable engagement ring stone.
That can be particularly appealing for designs where the stones are a major part of the visual impact, including large solitaires, elongated center stones, halos, three-stone rings and other multi-diamond designs.
It also gives shoppers considerably more freedom to choose a diamond based on the appearance they actually prefer rather than allowing the price difference between natural diamond sizes to dictate the design.
Consider a Natural Diamond If:
The diamond's natural origin, rarity and geological history are important parts of what the engagement ring represents to you.
Those characteristics are unique to natural diamonds and can't be reproduced by laboratory growth, even when the finished stones have essentially the same chemical, physical and optical properties.
So, Which Is Better: Lab Grown or Natural Diamonds?
There isn't a universal answer because the most important differences are ultimately origin, economics and personal priorities.
If you compare two beautiful diamonds based only on what you can see on the finger, laboratory origin doesn't prevent a diamond from delivering the brilliance, durability or visual presence expected from a diamond engagement ring.
The practical advantage of lab grown diamonds is straightforward: your budget can generally go considerably further.
That can mean choosing the larger oval you've been considering, moving from a solitaire into a three-stone design, choosing a more elaborate setting, selecting platinum instead of gold, or simply spending less while still getting the ring you want.
Natural diamonds offer something different: rarity and a geological history that lab grown diamonds, by definition, don't have.
Neither choice needs to be justified by pretending the other isn't a diamond.
Frequently Asked Questions
Are lab grown diamonds fake?
No. Lab grown diamonds are diamonds created under controlled conditions rather than formed naturally within the Earth. They have essentially the same chemical composition, crystal structure, optical properties and physical properties as natural diamonds.
Is moissanite a lab grown diamond?
No. Moissanite and diamond are different gemstones.
Moissanite can be an excellent engagement ring stone in its own right, but it has a different chemical composition and different optical properties from diamond. See our Moissanite vs Diamond guide for a more detailed comparison.
Can a jeweler tell if a diamond is lab grown?
Reliable identification may require specialized testing equipment. High-quality lab grown and natural diamonds can appear essentially identical to the unaided eye.
Do lab grown diamonds get cloudy?
Lab grown diamonds don't inherently become cloudy because they're lab grown. Like natural diamonds, they can accumulate oils, lotions and everyday residue that temporarily reduce their brilliance. Cleaning the diamond restores its appearance when surface buildup is the cause.
Can lab grown diamonds scratch?
Diamond is exceptionally hard and resistant to scratching, whether natural or lab grown. However, diamonds aren't indestructible and can still chip or suffer damage from a sufficiently hard impact.
Are lab grown diamonds good for engagement rings?
Yes. Their diamond composition, brilliance, hardness and availability across a wide range of shapes and sizes make lab grown diamonds particularly well suited to engagement rings.
Why are lab grown diamonds less expensive?
Laboratory production doesn't depend on discovering and extracting naturally occurring diamond deposits, and technological advances have increased the available supply of gem-quality lab grown diamonds. The economics and scarcity of the two markets are therefore very different.
Are lab grown diamonds worth buying?
That depends on what you want from the purchase. Buyers who prioritize size, quality, design and purchase-price value may find lab grown diamonds especially compelling. Buyers who place significant value on natural rarity and geological origin may prefer natural diamonds.
What size lab grown diamond should I choose?
There is no ideal carat weight for every engagement ring. Finger size, diamond shape, setting and personal preference all affect how large a diamond appears.
A classic 1 carat lab diamond creates very different proportions from a 3 carat lab diamond or a 5 carat and larger diamond. Comparing actual millimeter dimensions and finished ring designs is more useful than choosing by carat weight alone.
Find Your Lab Grown Diamond Engagement Ring
Choosing lab grown doesn't mean choosing a particular engagement ring style.
The advantage is choice.
You can select the diamond shape you love, decide how much finger coverage you want, compare carat weights and then choose a setting that complements the center stone rather than building the entire ring around the price of a natural diamond.
Explore the complete Gema&Co Lab Grown Diamond Engagement Ring collection to compare shapes, carat weights and settings, or start with the characteristic that matters most to you:
Shop by shape: Round, Oval, Emerald, Radiant, Pear, Marquise, Cushion & Elongated Cushion, or Princess.
Shop by carat weight: 1 Carat, 2 Carat, 3 Carat, 4 Carat, or 5 Carat & Up.
Shop by setting: Solitaire, Pavé, Halo, Hidden Halo, Bezel, or Three Stone.
The result should be more than a diamond with impressive specifications. It should be a ring whose proportions, brilliance and design look exceptional together.
