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Exceptional Quality & Ethics from the Pioneers of the Industry

MiaDonna is the world’s first lab-grown diamond company, the first B Corp-certified diamond enterprise, and the trailblazing retailer of carbon-negative diamonds. Since 2005, we've fused innovation, sustainability, and philanthropy to create engineered diamonds that stand among the rarest diamonds on Earth. Here's why our diamonds reign supreme!

What Are Lab Grown Diamonds?

Lab grown diamonds, also known as engineered diamonds, synthetic diamonds, and lab diamonds, are REAL diamonds. They are grown in a controlled laboratory environment using advanced technology to replicate the earth's natural process of crystallizing carbon into brilliant diamonds.

Each diamond grown possesses the same chemical and physical properties as natural diamonds, making them chemically, optically, and physically identical to earth-mined diamonds. Not only do they offer a sustainable and ethical alternative, they come at a more affordable price point without compromising quality.

Shop loose created diamonds

How to choose the best grown diamonds

Are Grown Diamonds Real?

Yes! It's a fact that lab diamonds are real diamonds, identical in every way (but the price!) to earth-mined diamonds. Except that MiaDonna’s lab-grown diamonds are better than 99% of all other diamonds, no matter their origin.

Not to be confused with cubic zirconia, moissanite, or a "look-a-like" diamond, grown diamonds are 100% pure crystallized carbon. Think of it as making ice in your modern-day freezer versus getting it from a glacier. Both are frozen H2O regardless of the origin.

We are crystalizing carbon into stunning rough diamonds that are then cut, polished, and graded just like earth-mined diamonds. Lab created diamonds carry the same optical, physical, and chemical properties. They have the same refractive index, dispersion, and hardness and are graded to the same standards as mined diamonds by leading independent gemological institutes, including the IGI, GIA, and GCAL.

Bespoke Lab Grown Diamond Engagement Rings and Fine Jewelry handcrafted with the top 1% of lab diamonds.

Not All
Lab-Grown Diamonds
are Created Equal!

Both of these diamonds are
graded the same: 1.02ct, SI2, H



How Much Do Lab Grown Diamonds Cost?

On average, MiaDonna’s created diamonds are priced up to 50% less than an earth-mined diamond of equivalent quality. However, the price of a lab-grown diamond depends on various factors such as the 4 c’s - carat weight, cut, color, and clarity, just like mined diamonds. This affordability opens up a world of possibilities, allowing you to choose a larger or higher quality lab-grown diamond for your budget. So, if you're looking for exceptional value without compromising on beauty, lab-grown diamonds are an enticing and cost-effective choice.

What factors influence the price of lab-grown diamonds?

The difference in price is because our supply chain is so much shorter. Earth-mined diamonds can travel to five countries and touch 20 hands before it reaches the end consumer. MiaDonna’s lab-created diamonds go from our labs to our casting house to you. Not only is it more efficient, but it’s also better for your wallet and the environment.

Shop by Diamond Shape

If you do not see a particular diamond shape, quality, or size in our database, contact us to search our off-line diamond inventory
or we can custom grow you your very own diamond!


How are Lab Grown Diamonds Made?

Grown diamonds are made one of two ways— either through High-Pressure High-Temperature (HPHT), or through Chemical Vapor Deposition (CVD). The majority of MiaDonna’s diamonds are grown using CVD which has been the most successful method in producing higher quality diamonds.
Learn more about MiaDonna’s History in lab diamonds.

What is Chemical Vapor Deposition (CVD)

Scientists start the process of growing a MiaDonna diamond by cutting a small piece of carbon, known as a seed. It is placed in a low-pressure microwave chemical vapor deposition (CVD) chamber. Hydrogen and methane gases combine with electrical energy, which ignites a plasma ball. From there, a cloud forms in the chamber, and carbon molecules rain on the seed. Within six to 12 weeks, a sizable rough diamond is formed. It is then cut, polished, and graded by the same world-renowned labs that certify earth-mined diamonds.

Learn more about Chemical Vapor Deposition Diamonds.

What is High Pressure High Temperature (HPHT)

HPHT recreates the natural growing environment found within the earth and is typically used to grow smaller gem diamonds. There are a few different types of HPHT technologies used. But the process best suited for producing gem-quality Lab Grown Diamonds to be set in finished jewelry is created using a BARS press.

The BARS press was invented by Russian scientists and uses a combination of inner and outer anvils to apply hydraulic pressure to the growth cell within the unit. The growth cell itself contains all the elements necessary to grow a diamond, including a tiny diamond seed, highly refined graphite, and a catalyst consisting of a mixture of metals and powders.

Consistent temperatures reaching 1,300 degrees Celsius and over 50,000 atmospheres of pressure are applied to the growth cell. Over a few days, the elements within the growth cell melt and then reform during cooling to create finished, rough, Lab Grown Diamonds ready to be extracted for cutting and polishing.

Learn more about High Pressure High Temperature Diamonds.



A grading certificate, also known as a diamond certificate or diamond grading report, provides an in-depth assessment and evaluation of a diamond's characteristics and quality. It serves as an objective and independent verification of a diamond's attributes, allowing buyers to make informed decisions and understand the value of their purchase. When it comes to lab-grown diamond grading, it follows a similar system to natural diamonds. Lab-grown diamonds are assessed based on the same criteria as mined diamonds, including the 4Cs: carat weight, cut, color, and clarity. These grading factors determine the quality and value of a lab-grown diamond.

Pro tip! Some lab-grown diamond companies grade their own diamonds, which is a huge conflict of interest. Make sure you buy a diamond with an independent grading report from a reputable diamond grading organization -- American grading labs are always best.

MiaDonna’s lab-grown diamonds are graded by IGI, GCAL, and GIA. Find your IGI graded lab diamond. Find your GCAL graded lab diamond. Find your GIA graded lab grown diamond.


How Ethical are Lab-Grown Diamonds?

As the first grown diamond company in America to be a Certified B Corporation, we have proven our commitment to not only meet but exceed the highest standards in social and environmental performance.

Every lab created diamond from MiaDonna is guaranteed conflict-free and sourced from highly sophisticated labs where they are created and cut in a controlled environment. But we go one step further with our Lab Grown Diamonds. Profits from every purchase at MiaDonna fund our foundation, The Greener Diamond, which empowers diamond mining communities to live a life outside of poverty and diamond mining.

Not all lab grown diamonds are sustainable and eco-friendly, do not be fooled by the greenwashing.