A lab-grown diamond engagement ring gives you the brilliance, durability, and fire of a traditional diamond without the environmental and humanitarian concerns tied to mining. At MiaDonna, every lab-grown diamond ring is handcrafted with precious metals and set with ethically created stones — so 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
• Free shipping within the USA
• A 60-day return policy with one complimentary resizing
• The knowledge that one tree is planted for every purchase
We've been redefining the diamond industry since 2005, offering couples a modern, responsible alternative without compromising on quality or design.
MiaDonna offers lab-grown diamond engagement rings in every style imaginable, so you can find the perfect ring for the person you love.
Solitaire Engagement Rings
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.
Halo Engagement Rings
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.
Three-Stone Engagement Rings
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.
Vintage & Antique-Inspired Rings
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.
Hidden Halo Engagement Rings
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.
Side-Stone Engagement Rings
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.
Promise Rings
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.
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 the ground up. 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 free 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, recycled 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 free 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. Since 2005, we have been committed to offering a thoughtful, modern alternative to traditional diamond jewelry – one that combines timeless beauty with exceptional craftsmanship and lasting value.
Our friendly, non-commissioned jewelry experts are available for free consultations to help you explore designs or create a custom ring. Every MiaDonna lab-grown diamond engagement ring includes free shipping within the USA, free 60-day returns, and one complimentary resizing.
Celebrate your once-in-a-lifetime moment with a lab-grown diamond engagement ring crafted to last, made to be loved, and designed to reflect the beauty of your commitment.
Finding the right lab-grown diamond engagement ring comes down to a few important considerations:
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 brilliance and sparkle.
Set a budget.
Lab-grown diamond engagement rings typically cost 40% less than comparable mined-diamond rings, which means your budget goes further — whether that means a larger stone, a more intricate setting, or both.
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 free consultations to help you decide.
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.
Think about lifestyle.
An active partner may prefer a lower-profile setting like a bezel or flush mount, while someone who loves glamour may prefer a halo or side-stone design.
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 lab-grown diamonds are certified by recognized grading organizations, 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
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 free 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?
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
