Lab Grown

Stunning Lab-Grown Sapphires, Rubies, Emeralds, and Alexandrites. Identical to the highest quality earth-mined gems but 90% less the price!

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Lab Grown Gem Benefits

Real lab grown gemstones


Lab Created Gems are chemically, optically and physically identical to earth-mined gemstones.

Lab grown gemstone value


Priced at $395 USD per carat and come free of any environmental or humanitarian concerns to gemstones.

conflict free


Every purchase at MiaDonna funds our foundation The Greener Diamond, which restores diamond mining communities.


Add a little color to your life.

MiaDonna’s selection of lab grown gemstones (also called lab created gemstones or synthetic gemstones) are the best on the market. They are created using the most scientifically advanced processes to produce beautiful, precision-cut, gemstones in a wide variety of colors, sizes and shapes. Personalize any of our jewelry styles with a colored gem.

What are lab grown gemstones

Ring shown: Jessica three stone ring set with an emerald shaped Padparadscha and Champagne Sapphire side stones.

What are lab grown gemstones?

Lab-grown gemstones are the stunning, ethical and affordable alternative to earth-mined gems. By recreating the earth’s natural process in a controlled lab environment, we are able to create Rubies, Emeralds, Alexandrites, and Sapphires that are higher quality and more beautiful than most earth-mined equivalents. With a lab gemstone gemstone, you get a show stopping centerstone without having to worry about negatively affecting the environment or humanity.

Shop Loose Gemstones

Are lab created gemstones real gems?

Yes! Just like lab-grown diamonds, our gems are 100% real! Our laboratory techniques produce REAL synthetic Rubies, Sapphires, Emeralds, and Alexandrites, that are chemically, physically and optically identical to earth-mined gemstones, but the best part is they are up to 90% less!

Click here to start building your dream ring with a colored gemstone!

are lab grown gemstones real gems?

Ring shown: Custom made Solitaire set with a 5.85ct emerald shaped Emerald lab grown gemstone.

How much are MiaDonna's lab grown gemstones

Ring shown: Delphine Vintage Engagement Ring set with an oval shaped lab grown Blue Sapphire.

How much are MiaDonna's lab grown gemstones?

Our conflict-free, lab-grown gemstones are priced at only $395.00 per carat - approximately 5-10% the cost of a mined gemstone.

Click here to shop loose lab grown gemstones.

What makes MiaDonna Gems better than others?

MiaDonna lab-grown gems are simply better. All of our Sapphires, Rubies, Emeralds, and Alexandrites are created using the Flux Fusion method which generates optimal brilliance and light return for the highest quality gems.

Personalize any one of our styles with a colored gemstone. Start creating your dream ring today.

What makes MiaDonna Gems better than others

Ring shown: Chorus Three Stone Ring set with a pear shaped Champagne Sapphire and styled with a Diamond V Band.

How are lab grown gems created

Ring shown: Flora Vintage Ring set with an oval shaped Blue Sapphire.

How are lab grown gems created?

MiaDonna offers the most technologically advanced lab-grown gemstones from Chatham. Chatham creates their high-quality gemstones using a single growing method called Flux Fusion. During the growing period (six months to a year) the chamber’s temperature and chemistry are carefully controlled to duplicate the environment in the area of the earth where that gemstone variety forms. Over time the crystal begins to grow on the ‘seed’ in its natural crystal shape. Since foreign materials found in the earth are eliminated from a starting ‘seed’, the crystal grows more predictably, which in turn consistently produces the best qualities and colors - even better than those found in nature. Once this process is finished, the outcome is a rough crystal identical to one found in nature which results in the highest quality lab grown gemstones available.

When I decided I wanted an engagement ring, I knew that I had to get something that aligned with my values of sustainability and ethics. I looked at every eco-friendly and ethical jewelry company I could find, but I kept coming back to MiaDonna because the jewelry is gorgeous and the lab-grown gems and recycled precious metals aligned with my beliefs.

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Over my 50 years, and thousands of company contacts, I have never met another more devoted person willing to take these extra steps to help better another life's existence. Anna-Mieke Anderson [MiaDonna CEO] is showing us all in the jewelry industry that profit has many facets and that not all benefits are in one’s bank account.

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Lab grown Sapphires

Ring shown: Flora Vintage Ring set with an oval shaped Blue Sapphire.


Sapphires are associated with blessings, divine knowledge, sincerity, and faithfulness. They are also the birthstone for September and the gem of the 5th and 45th anniversaries.

While all colors of Sapphire are beautiful, the most popular color, especially for engagement rings, is blue. Blue Sapphire is the most difficult gem crystal to grow. Color in Sapphire often follows the crystal structure in color zones. Even the best Sapphire crystal has different shades of blue in it. That’s why lab grown blue Sapphires come in three lovely shades of blue, not just one. The price difference between the finest lab-grown and mined Sapphire of the same size and quality can be as much as $10,000 USD per carat!

Shop loose Blue Sapphires, Pink Sapphires, and Champagne Sapphires.


The rarest color of Sapphire, Padparadscha is the September birthstone, and used as the 5th and 45th anniversary gem.

True Padparadscha Sapphires are very rare in nature - most jewelers have never even seen one! Growing Padparadscha Sapphire crystals takes a lengthy process of about six months. The result is a beautiful range of orange-pink to red-orange colors, sometimes referred to as “sunrise and sunset” colors.

Browse Padparadscha Gems.

Lab grown Padparadscha

Ring shown: Jessica Three Stone Ring set with an emerald shaped Padparadscha and pear shaped Champagne Sapphire side stones.

Lab grown Rubies

Ring shown: Heroine Diamond Accented Ring set with a pear shaped Ruby.


Rubies are associated with intense passion, good luck, protection from misfortune, and personal inspiration. Ruby is the birthstone for July and the gem for the 15th and 40th anniversaries.

Fine Rubies glow like coals, with red fluorescence making them particularly vivid in sunlight. Rubies are very rare: it’s almost impossible to mine flawless Rubies and many mined Rubies are enhanced with heat and fracture filling to improve their appearance. Natural Rubies can command the highest per-carat price of any colored stone. This makes the Ruby one of the most important gems in the colored stone market.

Find Your Dream Ruby.


As the gem of spring, Emerald is the perfect choice as the birthstone for the month of May. It’s also the gem of the 20th and 35th wedding anniversaries.

Emeralds are fascinating gemstones made from a mineral called Beryl. They have the most beautiful and most intense radiant green color. It takes about a year from start to finish to grow an Emerald crystal: the crystals grow for about nine months. The controlled environment is rich in chromium to give the crystals a rich green hue, and allows them to grow larger and cleaner than the Emeralds grown in nature. Emeralds are at least twenty times more rare than diamonds, and in the finest grades they can sell for approximately the same per-carat price as earth-mined diamonds. Our lab grown Emeralds are identical to the finest grade earth-mined Emerald but are 3% the cost at only $395 USD per carat.

Shop Loose Lab Grown Emeralds.

Lab Grown Emeralds
How are lab grown gems created

Ring shown: Rosemary Ring set with a round shaped Alexandrite.


Alexandrite is a birthstone for June and is also the gem for the 45th and 55th wedding anniversary.

Alexandrite is the very rare color-change variety of the mineral chrysoberyl and is often described as “emerald by day, ruby by night,” because it changes color from bluish-green in fluorescent light to brownish or purplish-red in incandescent light. Originally discovered in Russia’s Ural Mountains in the 1830s, it’s now found in Sri Lanka, East Africa and Brazil, however, this fine gemstone is exceptionally rare and valuable, because it is no longer being mined.

The Alexandrites we grow are true laboratory-grown Alexandrite, the famous color-change chrysoberyl variety with the exact same properties as the mined gems. Some suppliers sell a chemically treated color-change synthetic Sapphire as “lab grown Alexandrite.” It isn’t Alexandrite and it doesn’t look at all like the real thing, due to the slight color change from blue to purple. If you see “Alexandrite” that doesn’t change from green to red, you’ll know that it is just an inexpensive imitation.

Pick your Alexandrite.


What is the Flux Fusion growing method?

This is a longer, more involved process of growing gems, however it provides many advantages. The most important being an identical internal structure that gives each MiaDonna gemstone optimal brilliance and light return.

The less advanced, alternative growing process of Flame Fusion uses a melting method to achieve a stone that carries the same look as a Ruby and/or Sapphire. This is what you will find at most competitors because it's the most commonly used method due to the low investment (approximately 1 cent per carat) and the quick turnaround (approximately 1 hour), however the lack of internal crystal structure means it will not carry the same brilliance as a natural Ruby or Sapphire, and will return a negative result when tested.

Are these gemstones enhanced or color treated?

No. Because our gemstones are grown in an extremely controlled environment, we are able to grow vivid colored gems without the need to use enhancement or color treating.

How are Lab Grown Gemstones cut?

When it comes to cutting gemstones, we use strict standards for proportions, faceting and polish that ensures that all of our gemstones have maximum brilliance, high clarity, and vivid color. To meet these standards, 80% of the rough crystal is lost. Saving extra weight is never a consideration, ensuring you receive the most beautiful and highest quality lab-grown gemstones available.

Can I tell the difference between grown gemstones and mined gemstones?

No! Since lab grown gemstones are 100% identical to earth-mined gemstones, only trained gemologists using high powered equipment can tell the difference.

Are lab grown gemstones as durable as mined gemstones?

Yes. They have the exact same chemical make-up as mined gems so they have the same score on the Mohs scale. All gemstones, whether mined or grown, are not as hard as diamond and should be treated with extra care and attention. We recommend removing your gemstone jewelry when doing housework, yardward, exercising, etc.

Do lab grown gemstones come with a warranty?

For your peace of mind, we provide a lifetime guarantee on all of our grown gemstones, something not offered with traditional earth-mined gems. We will gladly repair or replace your stone should it chip or break under ordinary circumstances, or should any defect in the workmanship or materials become apparent*.

*Excludes labor. Normal wear and tear damage is not covered.

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