Lab-Grown vs. Natural Diamonds: Understanding the Key Differences

When shopping for a diamond, one of the biggest decisions today is whether to choose a natural diamond or a laboratory-grown diamond. Both can offer the brilliance, durability, and beauty people associate with diamonds, but they differ significantly in origin, formation, market positioning, and price.

Laboratory-grown diamonds have become increasingly common in the jewelry market, giving buyers another option when choosing an engagement ring, diamond stud earrings, a diamond necklace, or other diamond jewelry.

Understanding how they compare with natural diamonds makes it easier to choose based on what matters most to you: origin, size, price, or long-term value.

What Is a Natural Diamond?

A natural diamond forms deep within the Earth under extremely high temperatures and pressures over geological periods that can span billions of years. Natural diamonds are brought closer to the Earth's surface through geological processes and are eventually recovered through mining.

Each natural diamond has its own characteristics resulting from the conditions it experienced while forming. Tiny inclusions, variations in color, and other internal features can provide clues about its geological history.

For many buyers, this natural origin is an important part of a diamond's appeal.

What Is a Lab-Grown Diamond?

A laboratory-grown diamond is created by people using advanced technology rather than being formed naturally beneath the Earth's surface. The two primary production methods are High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD).

HPHT technology recreates conditions similar to those involved in natural diamond formation, while CVD grows diamond material from carbon-containing gases in a controlled environment.

A lab-grown diamond is not the same as a diamond imitation. According to the Gemological Institute of America (GIA), laboratory-grown diamonds have essentially the same chemical, physical, and optical properties as natural diamonds.

Natural vs. Lab-Grown: Are They Real Diamonds?

Yes, both are diamonds. The major distinction is their origin. A natural diamond developed through geological processes, while a lab-grown diamond was created in a controlled laboratory environment. Both consist primarily of crystallized carbon arranged in the diamond crystal structure.

This is different from diamond simulants such as cubic zirconia or moissanite, which can resemble diamonds but have different chemical and physical properties.

How Are Natural and Lab-Grown Diamonds Different?

The most obvious difference is how they are formed. Natural diamonds have a geological history, while laboratory-grown diamonds are produced using modern manufacturing technology.

There can also be subtle differences in growth patterns and internal characteristics. These differences are not usually visible to the unaided eye, but advanced gemological equipment can identify them.

GIA notes that sophisticated testing may be required to reliably distinguish a laboratory-grown diamond from a natural one because their basic chemical and optical properties are so similar.

How Do They Compare in Appearance?

To the naked eye, a well-cut lab-grown diamond can look extremely similar to a natural diamond. Both can display brilliance, fire, and scintillation when properly cut and polished.

The quality of the individual stone matters more to its appearance than whether it was grown naturally or in a laboratory. Cut quality, proportions, polish, symmetry, color, and clarity all influence how a diamond interacts with light, which is why cut often matters more than carat weight.

Choosing between natural and lab-grown should not be based on the assumption that one automatically looks better.

Comparing the 4Cs

Both natural and laboratory-grown diamonds are described by carat weight, color, clarity, and cut, although the way GIA reports on lab-grown stones changed in 2025 (covered under grading reports below).

Carat refers to the diamond's weight, while color evaluates how much body color is present in a stone. Clarity considers internal and external characteristics, and cut evaluates how effectively the diamond has been shaped and finished to interact with light.

When comparing two diamonds, looking at these characteristics individually is more useful than focusing only on their origin. For what each grade means in a finished piece, including how G SI reads in person, see Diamond Carat and Clarity Explained.

Price Differences Between Lab-Grown and Natural Diamonds

One of the biggest practical differences for many buyers is price. Laboratory-grown diamonds are generally less expensive than comparable natural diamonds, although the exact difference can vary significantly depending on size, quality, shape, market conditions, and retailer.

This can allow a buyer to consider a larger laboratory-grown stone or put more of the spend toward the setting and overall design.

Natural diamonds, meanwhile, are valued within a market built around their geological origin, rarity, and established demand.

Does Natural Mean Better Quality?

Not automatically. A natural diamond can vary widely in quality, just as a laboratory-grown diamond can. A poorly cut natural diamond may have less brilliance than a well-cut laboratory-grown diamond. Similarly, a high-quality natural diamond can have exceptional visual performance and characteristics.

When comparing stones, examine the individual diamond's specifications and grading information rather than assuming origin determines quality.

Does Lab-Grown Mean Lower Quality?

No. Laboratory-grown diamonds can have very high levels of quality and can be produced in a range of sizes, colors, and clarity characteristics.

The distinction is primarily about origin rather than whether the material is actually diamond. GIA describes laboratory-grown diamonds as having essentially the same chemical, physical, and optical properties as natural diamonds.

Natural Diamond vs. Lab-Grown Diamond Comparison

What About Diamond Grading Reports?

A grading report can provide important information about a diamond's characteristics and origin. When buying either type, review the documentation carefully to understand what has been evaluated and which laboratory issued it.

GIA distinguishes between its documentation for natural diamonds and laboratory-grown diamonds. Its laboratory-grown documentation identifies the stone as laboratory-grown and can include information about the growth method.

Since 1 October 2025, GIA no longer issues D-to-Z color or Flawless-to-Included clarity grades for laboratory-grown diamonds. It now places a lab-grown stone in one of two categories, Premium or Standard. Natural diamonds continue to receive full color and clarity grades. Reports issued before that date remain valid, so a lab-grown listing that quotes specific color and clarity letters is drawing them from an earlier report or from a different laboratory. Either is fine, but it is worth knowing which.

A laboratory grading report is also a different document from an appraisal, which describes the finished piece and its replacement value. Our carat and clarity guide explains how the two differ.

Can You Tell the Difference by Looking at a Diamond?

In most cases, you cannot reliably determine whether a diamond is natural or laboratory-grown simply by looking at it. Even traditional gemological observations may not be enough to make a definitive distinction. Advanced laboratory equipment can examine growth characteristics and other subtle features that reveal whether a diamond formed naturally or was grown using HPHT or CVD technology.

This is particularly important when buying a valuable diamond and the origin has not been clearly documented.

Which Is Better for an Engagement Ring?

There is no single choice that works for every buyer. The decision depends on what matters most to you.

A natural diamond may appeal to someone who values geological origin, traditional diamond ownership, and the history associated with a naturally formed gemstone. A laboratory-grown diamond may appeal to someone who wants diamond material and similar visual characteristics while spending less on the stone.

The setting, design, quality, and total spend should also be considered. Browse diamond engagement rings and solitaire diamond rings to compare settings, or read the engagement ring buying guide for shopping tips.

Which Option Offers More Size for the Price?

With a fixed amount to spend, laboratory-grown diamonds can provide an opportunity to consider a larger stone or higher specifications at a lower purchase price compared with a comparable natural diamond. The difference shows most in pieces where stone size is the first thing people notice, such as diamond stud earrings.

However, size should not be the only consideration. A well-proportioned diamond with strong cut quality can often have greater visual appeal than a larger stone with less desirable characteristics.

What About Resale Value?

Resale value is an important consideration if you think you may eventually sell the jewelry.

Natural and laboratory-grown diamonds occupy different positions in the resale market, and their original retail prices should not be assumed to represent what a future buyer will pay. Market demand, diamond characteristics, condition, documentation, and current pricing all influence resale considerations.

If resale potential is important to you, discuss it with a knowledgeable jewelry professional before purchasing.

What Should You Consider Before Buying?

• Decide whether natural origin or laboratory-grown origin matters more to you.
• Compare diamonds using their documented characteristics rather than appearance alone.
• Review the grading documentation, and which laboratory issued it, before making a purchase.
• Consider cut quality carefully because it has a major effect on brilliance.
• Compare the total cost of the diamond and setting rather than focusing only on carat weight.
• Ask clearly whether a diamond is natural or laboratory-grown.
• Purchase from a reputable seller that clearly discloses the diamond's origin.

The Federal Trade Commission advises that laboratory-grown diamonds should be clearly described as laboratory-grown or laboratory-created so consumers understand that they are not mined diamonds.

For a broader pre-purchase checklist, see All You Need to Know Before Buying Diamond Jewelry.

Choosing the Right Diamond for You

The natural versus lab-grown decision ultimately comes down to personal priorities. Both options can provide the beauty and durability expected from diamond jewelry, but their origins and market characteristics are different.

If the geological history and natural origin of a gemstone are important to you, a natural diamond may fit your preferences. If getting more size or higher specifications at a particular price is the priority, a laboratory-grown diamond may be the better fit.

The key is to understand exactly what you are buying and compare individual diamonds based on quality, documentation, price, and your own priorities.

Frequently Asked Questions

Are lab-grown diamonds real diamonds?

Yes. A lab-grown diamond is crystallized carbon with essentially the same chemical, physical, and optical properties as a natural diamond. It differs in origin, not in material. Simulants such as cubic zirconia are different substances that only imitate a diamond's appearance.

Will a lab-grown diamond pass a diamond tester?

Yes. A standard handheld diamond tester confirms that a stone is diamond, but it cannot tell natural from lab-grown. Separating the two requires advanced laboratory equipment that reads growth characteristics.

Does GIA still grade lab-grown diamonds?

GIA still issues reports for lab-grown diamonds, but since 1 October 2025 it no longer assigns them D-to-Z color or Flawless-to-Included clarity grades. Lab-grown stones now receive a Premium or Standard quality assessment. Natural diamonds continue to receive full color and clarity grades.

Are lab-grown diamonds as durable as natural diamonds?

Yes. Both are diamond, so both rate 10 on the Mohs hardness scale and hold up the same way to everyday wear. Setting quality and care matter more to how a piece lasts than the stone's origin.

Do lab-grown diamonds hold their value?

Not in the same way as natural diamonds. The resale market for lab-grown stones is more limited, and the retail price of either type should not be taken as a guide to what a future buyer will pay. If resale matters, factor it into the decision before buying.

Is moissanite the same as a lab-grown diamond?

No. Moissanite is silicon carbide, a different material with its own optical properties. It can be grown in a laboratory, but it is not diamond, and it is sold as a diamond alternative rather than a lab-grown diamond.

Are lab-grown diamond stud earrings a good choice?

They can be, especially when visible stone size is the priority. Studs are seen face-up from the front, so a larger lab-grown stone makes a noticeable difference at the same price. Buyers who want a piece to keep or pass on often choose natural instead. Both options are available in the diamond stud earrings collection.

Final Thoughts

Natural and laboratory-grown diamonds are both genuine diamonds, but they come from very different growth environments. Natural diamonds form through geological processes over immense periods, while laboratory-grown diamonds are produced using HPHT or CVD technology.

Understanding the differences in origin, pricing, grading, appearance, and market considerations makes the buying process much easier.

Davizi Jewels carries both natural and lab-grown diamond jewelry. Browse diamond stud earrings, diamond tennis bracelets, and diamond necklaces, or contact the team at 800-504-0454 for help comparing specific stones. Appointments are available at 36 W 47th St in New York's Diamond District.