MiaDonna's lab-grown diamond engagement rings bring together exceptional craftsmanship, ethical sourcing, and lasting value. Each ring features a lab-grown diamond, optically, physically, and chemically identical to a mined diamond, set in precious metals and backed by our lifetime guarantee.
As the original lab-grown diamond company, selling lab-grown since 2005, we've spent nearly two decades redefining what fine jewelry can be. Every stone is independently graded, and every setting is crafted to last a lifetime.
Why Choose a Lab-Grown Diamond Engagement Ring from MiaDonna
Founded in 2005, MiaDonna has sold lab-grown diamonds exclusively from day one – the original lab-grown fine jeweler, without compromising on quality or design.
A lab-grown diamond engagement ring gives you the brilliance, durability, and fire of a mined diamond, without the environmental and humanitarian concerns tied to mining. At MiaDonna, every lab-grown diamond ring is crafted in precious metals and set with the finest lab-grown diamonds and gemstones, making your ring is as meaningful as the moment it represents.
When you choose a MiaDonna lab-grown diamond engagement ring, you also receive:
A lifetime guarantee on craftsmanship
Complimentary shipping globally
A 60-day return policy with one complimentary ring resizing
Complimentary engraving
The knowledge that one tree is planted with every purchase
Build Your Ring, Your Way
Not sure whether to start with the diamond or the setting? With MiaDonna's ring builder, you choose. Browse our full inventory of over 90,000 lab-grown diamonds to hand-select the exact stone you want, or choose a carat weight and quality range and let our diamond specialists select the best available match for you. Then pair it with a setting, or start with the setting first and work backward.
A step-by-step progress bar guides you through every choice, so you always know where you are and what's left to decide. Pricing updates in real time as you build, and your progress is saved automatically, so you can step away and pick up right where you left off.
When you build with MiaDonna, you also get:
Access to over 90,000 lab-grown diamonds, hand-selected or specialist-matched
Real-time pricing with no hidden costs at checkout
Every diamond backed by IGI, GIA and GCal certification
The same lifetime guarantee and complimentary resizing included with every ring
Custom Lab-Grown Diamond Engagement Rings
Can't find the exact ring you're envisioning? MiaDonna's custom design service lets you create a one-of-a-kind lab-grown diamond engagement ring from scratch. Choose your diamond shape, carat weight, and quality, then select your setting style and metal – our expert jewelers bring your vision to life with the same ethical craftsmanship behind every ring in our collection.
The process is simple and guided. Start with a complimentary consultation with one of our non-commissioned jewelry experts, who will walk you through design options, provide renderings, and help you refine every detail before production begins. Whether you're reimagining a family heirloom, designing from a sketch, or starting with just an idea, MiaDonna makes it possible, all with lab-grown diamonds, precious metals, and the same lifetime guarantee that comes with every ring we craft.
Custom lab-grown diamond engagement rings from MiaDonna typically take four to six weeks from consultation to delivery, with complimentary shipping and our standard 60-day return policy included.
Click here to learn more about our custom design services.
At MiaDonna, every lab-grown diamond engagement ring is designed to celebrate your unique love story. Founded in 2005, MiaDonna has sold lab-grown diamonds exclusively from day one, making us the original lab-grown fine jeweler. We offer a thoughtful, modern alternative to traditional diamond jewelry that combines timeless beauty with exceptional craftsmanship and lasting value.
Our friendly, non-commissioned jewelry experts are available for complimentary consultations to help you explore designs or create a custom ring. Every MiaDonna lab-grown diamond engagement ring includes complimentary shipping, complimentary 60-day returns, and one complimentary resizing.
Finding the right lab-grown diamond engagement ring comes down to a few important considerations, from diamond quality to fit to budget.
Understand the Four Cs
Cut, color, clarity, and carat weight are the primary characteristics that determine a diamond's beauty and value. Of these, cut has the greatest impact on a diamond's brilliance and sparkle, making it worth prioritizing over the others if you're working within a set budget.
Set a Budget
Lab-grown diamond engagement rings typically cost considerably less than comparable mined-diamond rings, which means your budget goes further. That means a larger center stone, a more intricate setting, or both. Establishing a budget early narrows the search and makes comparing styles and shapes easier.
Know Your Partner's Style
Pay attention to the jewelry they already wear. Do they gravitate toward classic pieces, vintage designs, or modern minimalism? If you're unsure, MiaDonna's non-commissioned jewelry experts offer complimentary consultations to help you decide between solitaire, halo, three-stone, and vintage-inspired settings.
Choose the Right Metal
Consider your partner's skin tone, lifestyle, and existing jewelry when selecting between platinum, white gold, yellow gold, or rose gold. Each metal offers a different balance of durability, tone, and maintenance.
Think About Lifestyle
An active partner may prefer a lower-profile setting like a bezel or flush mount, while someone who loves glamour may lean toward a halo or side-stone design. The right engagement ring setting should hold up to how your partner actually lives day to day.
Verify Ring Size
Use MiaDonna's
Ring Sizing Guide
, or borrow a ring your partner already wears on their ring finger. Every MiaDonna engagement ring includes one complimentary resizing within 60 days.
Look for Certification
MiaDonna's lab-grown diamonds are certified by IGI (International Gemological Institute), which grades lab-grown stones using the same 4Cs standards applied to mined diamonds, ensuring verified quality and authenticity.
The shape of your lab-grown diamond dramatically affects the ring's character. MiaDonna offers engagement rings in all of the most popular diamond shapes:
Round
The most classic and brilliant diamond shape, ideal for maximum light return
Oval
Elongated and modern, creating the illusion of a larger stone on the finger
Cushion
A soft, romantic cut that blends vintage charm with contemporary sparkle
Emerald
Elegant step-cut faceting that emphasizes clarity and geometric beauty
Princess
A square brilliant cut that delivers bold sparkle in a modern silhouette
Pear
A teardrop shape that is distinctive, flattering, and eye-catching
Marquise
An elongated shape with pointed ends that maximizes carat weight
MiaDonna offers lab-grown diamond engagement rings in every style imaginable, so you can find the perfect ring for the person you love.
A single lab-grown diamond set in a classic band — timeless, elegant, and designed to let the stone speak for itself. Our solitaire lab-grown diamond rings are available in round, oval, cushion, emerald, pear, marquise, and princess cuts.
A center lab-grown diamond surrounded by a frame of smaller accent stones, creating the appearance of a larger, more brilliant centerpiece. Halo lab-grown diamond engagement rings are ideal for maximizing sparkle and visual impact.
Symbolizing past, present, and future, three-stone lab-grown diamond rings feature a larger center stone flanked by two complementary gems. This style is one of MiaDonna's most meaningful and popular designs.
For those drawn to old-world charm, our vintage-style lab-grown diamond engagement rings incorporate intricate milgrain detailing, filigree work, and romantic silhouettes that recall a bygone era.
A lab-grown diamond set above a delicate ring of smaller accent stones concealed beneath the center stone. Hidden halo lab-grown diamond engagement rings deliver extra sparkle visible from the side profile while maintaining a clean, streamlined look from above.
Accent diamonds line the band to complement the center stone, adding depth and brilliance from every angle. Side-stone lab-grown diamond engagement rings offer an elegant step up from a simple solitaire.
A meaningful step before the proposal, lab-grown diamond promise rings symbolize commitment and devotion. MiaDonna's promise rings feature elegant, understated designs with lab-grown diamonds that are perfect for marking the beginning of your journey together.
What is a lab-grown diamond engagement ring?
A lab-grown diamond engagement ring features a diamond created in a controlled laboratory environment using advanced technology that replicates the natural diamond-forming process. Lab-grown diamonds are optically, physically, and chemically identical to mined diamonds.
Are lab-grown diamonds real diamonds?
Yes. Lab-grown diamonds have the same crystal structure, chemical composition, hardness (10 on the Mohs scale), and optical properties as earth-mined diamonds. They are certified by the same grading organizations and are indistinguishable to the naked eye.
What are conflict-free engagement rings?
Conflict-free engagement rings use diamonds and materials sourced through ethical, ecologically responsible, and socially conscious practices. Because all MiaDonna diamonds are lab-grown and our metals are recycled, every MiaDonna engagement ring is conflict-free.
Can I design a custom lab-grown diamond engagement ring with MiaDonna?
Absolutely. MiaDonna offers a custom design service where you can choose from a range of settings, metals, and lab-grown diamonds or gemstones to create a ring that is uniquely yours. Our team guides you through every step of the process.
What metals are available for MiaDonna lab-grown diamond engagement rings?
MiaDonna offers platinum, 14K and 18K white gold, yellow gold, and rose gold. All metals are recycled and responsibly sourced.
How do I find the right ring size?
Use MiaDonna's online
Ring Sizing Guide
, or visit a local jeweler for a professional measurement. If the fit isn't perfect, every MiaDonna engagement ring includes one complimentary resizing within 60 days of purchase.
What are the most popular lab-grown diamond engagement ring settings?
The most popular settings at MiaDonna include classic solitaires, halo designs, three-stone rings, and vintage-inspired settings. Each style highlights the center diamond in a unique way.
Can MiaDonna engagement rings be resized?
Yes. MiaDonna offers one complimentary resizing (up or down one full size) within 60 days of when your ring ships, including return shipping.
Does MiaDonna have a physical store where I can view lab-grown diamond rings in person?
Yes. MiaDonna's flagship boutique is located in Portland, Oregon. You can visit the store to browse the collection, try on rings, and work with our jewelry experts in person.
The metal you choose influences your ring's durability, color, and overall aesthetic. MiaDonna crafts lab-grown diamond engagement rings in the following recycled and responsibly sourced metals:
Platinum
The most durable precious metal, naturally hypoallergenic with a cool white finish
14K & 18K White Gold
A classic, versatile choice that complements every diamond shape
14K & 18K Yellow Gold
Warm and traditional, with a rich tone that pairs beautifully with any stone
14K & 18K Rose Gold
Romantic and contemporary, with a distinctive blush hue
