What Is a Lab Grown Diamond? A Complete Beginner’s Guide

A lab grown diamond is a real diamond made in a laboratory instead of being mined from the earth. It has the same chemical makeup, the same crystal structure, and the same sparkle as a natural diamond. The only real difference is where and how it formed.

Today, more shoppers are choosing lab-grown diamonds for engagement rings, wedding bands, and everyday jewelry. The main reason is value. A lab-grown diamond usually costs much less than a natural diamond of similar size and quality, so buyers can get a bigger or better stone within the same budget. Many people also like knowing exactly where their diamond came from.

In this guide, you will learn what lab-grown diamonds are, how they are made, how they compare with natural diamonds, what affects their price, and how to choose the right one for you.

What Is a Lab Grown Diamond?

A lab grown diamond is a diamond created by people using advanced technology that recreates the heat, pressure, and carbon-rich conditions found deep inside the earth. It is not a coating, a copy, or a look-alike stone. It is diamond in every scientific sense.

Like all diamonds, it is made of pure carbon. The carbon atoms lock together in a tight, repeating pattern called a cubic crystal structure. This structure is what makes diamond so hard and allows it to reflect light with such brilliance. A lab-grown diamond has this exact same structure, so at the atomic level it is the same material as a mined diamond.

The main difference from a natural diamond is time and place. Natural diamonds formed underground over millions or even billions of years. Lab-grown diamonds form in a few weeks inside special machines. Once they are cut and polished, both look the same to the eye.

It is also important not to confuse lab-grown diamonds with simulants. Cubic zirconia and glass are different materials that only look similar to diamond. Moissanite is also a separate gemstone, made of silicon carbide. It is very hard and highly sparkly, and many buyers love moissanite engagement rings for their own reasons, but it is not diamond. A lab-grown diamond is a real diamond with a man-made origin.

How Are Lab Grown Diamonds Made?

Lab-grown diamonds are made using two main methods: HPHT and CVD. Both begin with a tiny piece of diamond called a “seed,” and both add new carbon to that seed until a larger diamond forms.

High Pressure High Temperature (HPHT) Method

The HPHT method copies the natural process that happens deep inside the earth. A diamond seed is placed in a chamber with a carbon source such as graphite. The chamber is then exposed to enormous pressure and temperatures of roughly 1,300 to 1,600°C. Under these conditions, the carbon melts into a metal mix, moves toward the seed, and slowly crystallizes into diamond. HPHT was the first method used to grow diamonds commercially and is still known for producing stones with good color.

Chemical Vapor Deposition (CVD) Method

The CVD method builds a diamond from gas instead of pressure. Thin diamond seed plates are placed in a sealed chamber filled with a carbon-rich gas, usually methane mixed with hydrogen. Energy, often from microwaves, breaks the gas apart. Carbon atoms then settle onto the seeds and build up the diamond one thin layer at a time. CVD gives producers more control over the growing process and is widely used today, especially for larger diamonds. Some CVD stones receive a treatment after growth to improve their color, which should always be listed on the grading report.

How Long Does It Take to Grow a Diamond?

Growing time depends on the method, the size of the stone, and the quality the producer is aiming for. Small diamonds can grow in a few days, while a stone that becomes a 1 to 2 carat polished diamond usually takes a few weeks. Growing too quickly can cause flaws, so high-quality stones are grown carefully. After growth, the rough diamond still needs cutting, polishing, and grading before it is ready for jewelry. Compared with the millions of years natural diamonds need, this speed is a big reason lab-grown diamonds cost less.

Are Lab Grown Diamonds Real Diamonds?

Yes, lab-grown diamonds are real diamonds. The U.S. Federal Trade Commission defines a diamond by what it is made of, not where it came from. Sellers must clearly say the stone is lab-grown, but they can still call it a diamond.

Physically and chemically, lab-grown and natural diamonds are the same. They share the same carbon makeup, hardness, density, and the way they bend and reflect light. That is why they show the same brilliance and fire, and why a basic handheld diamond tester usually reads both as diamond.

Gemologists can still tell them apart, but only with advanced equipment. Because lab-grown and natural diamonds grow in different environments, they leave behind small clues such as different growth patterns, trace elements, inclusion types, and reactions under ultraviolet light. These details cannot be seen with a regular jeweler’s loupe.

This is why professional gemological testing is so important. An independent lab can confirm that a stone is diamond, identify whether it is natural or lab-grown, grade its quality, and note any treatments. Many labs also laser-inscribe a report number and the words “lab-grown” on the edge of the diamond, giving buyers extra confidence.

Lab Grown Diamonds vs. Natural Diamonds

Lab-grown and natural diamonds are both beautiful and durable. The best choice depends on what matters most to you, whether that is budget, size, origin, or long-term value.

Appearance and Brilliance

There is no visible difference between the two. A well-cut lab-grown diamond and a well-cut natural diamond of the same grades will sparkle exactly the same way. What truly controls a diamond’s beauty is the quality of its cut, not whether it came from a mine or a lab. This is especially clear in round cut diamond engagement rings, where the brilliant cut is designed for maximum sparkle.

Durability and Hardness

Both types score 10 on the Mohs hardness scale, which makes them the hardest material used in jewelry. They resist everyday scratches and are suitable for daily wear. Like any diamond, they can still chip if hit hard at the wrong angle, but this applies equally to both.

Price and Value

Price is the biggest difference. Lab-grown diamonds usually cost much less than natural diamonds with similar specifications, and their prices have dropped over the last few years as production has increased. Natural diamonds cost more because they are rare and expensive to mine. When it comes to resale, natural diamonds generally hold their value better, while lab-grown diamonds currently have very limited resale value.

Origin and Environmental Considerations

Lab-grown diamonds have a clear and traceable origin with no mining involved. However, growing them uses a lot of energy, so their environmental impact depends on how the producer powers its facilities. Natural diamonds come from mines, which disturb land, although responsible mining standards and programs like the Kimberley Process aim to reduce harm and stop conflict diamonds. If origin matters to you, ask the seller for production details.

Comparison Table

Are Lab Grown Diamonds Cheaper Than Natural Diamonds?

Yes, lab-grown diamonds are usually much cheaper than natural diamonds of the same size and quality. Many buyers use the savings to choose a larger stone, a higher grade, or a more detailed setting. Because prices change often, it is best to compare current listings rather than older price charts.

Just like natural diamonds, the price of a lab-grown diamond depends on the 4Cs. Larger carat weights cost more, especially at popular sizes like 1 carat and 2 carats. A better cut increases both beauty and price. Colorless grades cost more than near-colorless ones, and diamonds with fewer inclusions cost more than those with visible flaws. Shape also plays a role, with round diamonds usually priced higher than fancy shapes like oval or pear.

You may also notice that two similar diamonds have very different prices at different stores. This can happen because of the grading lab used, post-growth treatments, the retailer’s business costs, and extra services such as warranties, free resizing, or upgrade programs. Ongoing increases in production have also pushed overall prices down. That is why it is always smart to compare full specifications and grading reports, not just the price tag.

Do Lab Grown Diamonds Last Forever?

Lab-grown diamonds are just as durable as natural diamonds. They will not fade, change color, or lose their sparkle with normal wear, which makes them a great choice for jewelry worn every day. Still, it is a good habit to remove rings during heavy work, workouts, or sports, and to store diamond pieces separately so they do not scratch other jewelry.

Keeping your diamond clean is simple. Soak it in warm water with a few drops of mild dish soap, gently brush around the stone with a soft toothbrush, rinse, and dry with a soft cloth. Having a jeweler check the prongs and setting once or twice a year helps keep the diamond secure. For more detailed advice, read our jewelry care guide.

It is important to remember that durability is not the same as value. A lab-grown diamond can last for generations, but its resale value is low and prices for new stones continue to fall. It is best to buy one because you love wearing it, not as a financial investment.

How to Choose a High-Quality Lab Grown Diamond

Understand the 4Cs: Cut, Color, Clarity, and Carat

The 4Cs are the foundation of choosing any diamond. Cut matters most because it controls how much the diamond sparkles, so aim for Excellent or Ideal grades when possible. Color is graded from D (colorless) to Z, and many buyers find G or H offers a great balance of beauty and value. Clarity measures inclusions, and VS1 or VS2 stones usually look clean to the eye at a fair price. Carat measures weight, not size, so two stones of the same weight can look different depending on their cut and shape. Since lab-grown diamonds cost less, many buyers move up in cut and color without going over budget.

Check Diamond Grading Reports

Always ask for a grading report from an independent lab such as IGI or GIA. A good report confirms that the diamond is lab-grown, lists its quality grades and measurements, and notes any treatments. It also includes a report number that you can verify online and often match to the inscription on the diamond itself.

Choose the Right Diamond Shape

Shape sets the overall style of your jewelry. Round diamonds offer the most sparkle and a classic look, while oval cut lab grown diamond rings appear larger for their weight and flatter the finger. Princess cut diamonds feel modern, cushion cut stones have a soft vintage charm, and emerald cut diamonds offer a clean, elegant look. Start with the shape you love most, then adjust the other specifications around it.

Select the Right Setting and Metal

The setting holds and protects the diamond while shaping the final design. A solitaire engagement ring keeps things simple and timeless, a halo engagement ring adds extra sparkle, and a bezel set engagement ring offers strong protection for active lifestyles. For something more symbolic, a three stone engagement ring is a meaningful choice. For metal, white gold and platinum give a bright modern look, yellow gold feels warm and classic, and rose gold adds a soft romantic tone. Choose the combination that suits your style, skin tone, and daily routine.

Compare Price, Quality, and Return Policies

Before buying, compare similar diamonds across a few retailers using the same specifications. Look at real photos or videos of the exact stone instead of stock images. Read the return and refund policy, warranty terms, and resizing options carefully, and check your size with a ring size guide before ordering. A seller with clear policies and good support is often the better choice, even if the price is slightly higher.

What Jewelry Can You Buy With Lab Grown Diamonds?

Lab Grown Diamond Engagement Rings

Engagement rings are the most popular use for lab-grown diamonds. Their hardness makes them ideal for daily wear, and the lower price allows couples to choose a larger center stone or a more detailed design. You can explore a full range of lab grown diamond engagement rings in different shapes and settings.

Lab Grown Diamond Wedding Bands

Lab grown diamond wedding bands can feature stones set halfway or all the way around the band. Eternity and stackable styles pair beautifully with engagement rings, and many couples choose matching lab grown diamond bridal sets for a perfectly coordinated look.

Lab Grown Diamond Necklaces and Pendants

A simple lab grown diamond pendant is a timeless gift that works with almost any outfit. For more sparkle, a lab grown diamond tennis necklace makes a bold statement. Because pendants face less daily impact than rings, they are a great place to choose a larger stone.

Lab Grown Diamond Earrings and Bracelets

Diamond stud earrings are a classic everyday piece, and lab-grown diamonds make larger matching pairs more affordable. Hoops and drop earrings add elegance for special occasions. A lab grown diamond tennis bracelet looks stunning on its own and is easy to stack with other jewelry.

FAQ

Are lab-grown diamonds worth buying?
For many buyers, yes. You get a real diamond with the same beauty and durability as a natural one at a much lower price. If resale value or natural rarity matters most to you, a natural diamond may be a better fit.

Can you tell the difference between lab-grown and natural diamonds?
Not by eye or with a regular jeweler’s loupe. Only advanced lab equipment can reliably identify a diamond’s origin.

Do lab-grown diamonds get cloudy over time?
No. Diamonds do not turn cloudy with age. If your diamond looks dull, it is usually covered in oil or dirt, and a simple cleaning will restore its sparkle.

Do lab-grown diamonds have resale value?
Very little at the moment. The resale market is small and new prices keep falling, so it is best to treat a lab-grown diamond as jewelry to enjoy rather than an investment.

Are lab-grown diamonds certified?
Many are. Trusted sellers provide reports from independent labs like IGI or GIA, and you should always verify the report number online.

Are lab-grown diamonds suitable for engagement rings?
Yes. They are just as hard and durable as natural diamonds, so they hold up well to everyday wear and are a popular choice for engagement rings.

Final Thoughts 

A lab grown diamond offers real diamond beauty, strength, and sparkle at a price that is usually much lower than a natural diamond. It lets you choose a larger stone, better grades, or a more beautiful setting while staying within your budget, and it comes with a clear, traceable origin.

There are some trade-offs to keep in mind. Lab-grown diamonds have limited resale value, and their prices continue to change as production grows. Some buyers also prefer the rarity and history of natural diamonds.

The right choice depends on your priorities. Take time to compare different designs, understand the 4Cs, read the grading report, and review the retailer’s return and warranty policies. If you have a specific idea in mind, a custom jewelry design lets you choose every detail. With the right information, you can choose a lab-grown diamond that looks stunning, fits your budget, and stays beautiful for years to come.