4 Carat Lab Grown Diamond Engagement Rings

    Experience luxury redefined. Our 4 carat lab grown diamond engagement rings showcase breathtaking brilliance—ethically crafted for magnificent sparkle and timeless elegance.
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    MOST LOVED
    Oval Petite Adora Solitaire Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Oval Petite Adora Solitaire Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Petite Adora Solitaire Diamond Engagement Ring
    $3,450
    MOST LOVED
    Oval Accented Twisted Vine Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Oval Accented Twisted Vine Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Accented Twisted Vine Diamond Engagement Ring
    $3,790
    Marquise Willow Three Stone Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Marquise Willow Three Stone Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Willow Three Stone Diamond Engagement Ring
    $3,890
    Round Luxe Belle Lab Grown Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Round Luxe Belle Lab Grown Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Luxe Belle Diamond Engagement Ring
    $3,590
    Round Three Stone Twisted Vine Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Round Three Stone Twisted Vine Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Three Stone Petite Twisted Vine Diamond Engagement Ring
    $3,950
    Most Loved
    Toi Et Moi Emerald and Pear Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Toi Et Moi Emerald and Pear Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Toi et Moi Emerald and Pear Diamond Engagement Ring
    $3,150
    Marquise Three Stone Engraved Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Marquise Three Stone Engraved Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Francis Three Stone Engraved Diamond Engagement Ring
    $3,890
    Hidden Halo
    Oval Aurea Lab Grown Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Oval Aurea Lab Grown Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Aurea Diamond Engagement Ring
    $3,690
    Hidden Halo
    Oval Mystique Halo Lab Grown Diamond Engagement Ring In 14K White Gold - Lucenjuri Oval Mystique Halo Lab Grown Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Mystique Halo Diamond Engagement Ring
    $3,550
    Marquise Myra Solitaire Lab Grown Diamond Engagement Ring In 14K Rose Gold - Lucenjuri Marquise Myra Solitaire Lab Grown Diamond Engagement Ring In 14K Rose Gold, Angle View
    4 Carat Myra Solitaire Diamond Engagement Ring
    $3,490
    Most Loved
    Toi Et Moi Oval and Pear Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Toi Et Moi Oval and Pear Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Toi et Moi Oval and Pear Diamond Engagement Ring
    $3,150
    Oval Alma 2mm Bezel Solitaire Diamond Engagement Ring In 18K Yellow Gold - Lucenjuri Oval Alma 2mm Bezel Solitaire Diamond Engagement Ring In 18K Yellow Gold, Angle View
    4 Carat Alma 2mm Bezel Solitaire Diamond Engagement Ring
    $4,050
    Oval Cordelia Lab Grown Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Oval Cordelia Lab Grown Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Cordelia Diamond Engagement Ring
    $3,650
    Marquise Capella Engraved Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Marquise Capella Engraved Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Capella Engraved Diamond Engagement Ring
    $3,590
    Round Tapered Baguette Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Round Tapered Baguette Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Tapered Baguette Diamond Engagement Ring
    $3,650
    Round Elle 2mm Bezel Solitaire Diamond Engagement Ring In 18K White Gold - Lucenjuri Round Elle 2mm Bezel Solitaire Diamond Engagement Ring In 18K White Gold, Angle View
    4 Carat Elle 2mm Bezel Solitaire Diamond Engagement Ring
    $3,990
    Toi Et Moi Radiant and Pear Accented Diamond Engagement Ring In 14K White Gold - Lucenjuri Toi Et Moi Radiant and Pear Accented Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Toi et Moi Radiant and Pear Accented Diamond Engagement Ring
    $3,250
    Emerald Elle East-West 2mm Bezel Solitaire Diamond Engagement Ring In 18K Yellow Gold - Lucenjuri Emerald Elle East-West 2mm Bezel Solitaire Diamond Engagement Ring In 18K Yellow Gold, Angle View
    4 Carat Elle East-West 2mm Bezel Solitaire Diamond Engagement Ring
    $3,990
    Round Twisted Vine Lab Grown Diamond Engagement Ring In 14K White Gold - Lucenjuri Round Twisted Vine Lab Grown Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Twisted Vine Diamond Engagement Ring
    $3,650
    Emerald Timeless Trinity Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Emerald Timeless Trinity Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Timeless Trinity Diamond Engagement Ring
    $3,690
    Marquise Petite Hudson Milgrain Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Marquise Petite Hudson Milgrain Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Petite Hudson Milgrain Diamond Engagement Ring
    $3,550
    Round Petal Six-Prong Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Round Petal Six-Prong Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Classic Petal Six-Prong Diamond Engagement Ring
    $3,590
    Bezel Toi Et Moi Oval and Pear Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Bezel Toi Et Moi Oval and Pear Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Bezel Toi et Moi Oval and Pear Diamond Engagement Ring
    $3,350
    Hidden Halo
    Radiant Petite Pavé Valentina Lab Diamond Engagement Ring In 14K Rose Gold - Lucenjuri Radiant Petite Pavé Valentina Lab Diamond Engagement Ring In 14K Rose Gold, Angle View
    4 Carat Petite Pavé Valentina Diamond Engagement Ring
    $3,650
    Toi Et Moi Oval and Marquise Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Toi Et Moi Oval and Marquise Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Toi et Moi Oval and Marquise Diamond Engagement Ring
    $3,150
    Pear Nova Lab Grown Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Pear Nova Lab Grown Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Nova Diamond Engagement Ring
    $3,650
    Round Concerto Three Stone Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Round Concerto Three Stone Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Concerto Three Stone Diamond Engagement Ring
    $3,690
    Round Sonata Three Stone Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Round Sonata Three Stone Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Sonata Three Stone Diamond Engagement Ring
    $3,850
    Marquise Luxe Twisted Vine Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Marquise Luxe Twisted Vine Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Luxe Twisted Vine Diamond Engagement Ring
    $3,950
    Oval Chateau Three Stone Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Oval Chateau Three Stone Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Chateau Three Stone Diamond Engagement Ring
    $3,950
    Round Petite Alma 1.6mm Bezel Solitaire Diamond Engagement Ring In 18K Yellow Gold - Lucenjuri Round Petite Alma 1.6mm Bezel Solitaire Diamond Engagement Ring In 18K Yellow Gold, Angle View
    4 Carat Petite Alma 1.6mm Bezel Solitaire Diamond Engagement Ring
    $3,890
    Pear Luxe Three Stone Pavé Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Pear Luxe Three Stone Pavé Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Luxe Fiona Three Stone Pavé Diamond Engagement Ring
    $3,890
    Marquise Laurel Diamond Engageemnt Ring In 14K Yellow Gold - Lucenjuri Marquise Laurel Diamond Engageemnt Ring In 14K Yellow Gold, Angle View
    4 Carat Laurel Diamond Engagement Ring
    $3,990
    Oval Mona Three Stone Lab Diamond Engagement Ring In 18K Yellow Gold - Lucenjuri Oval Mona Three Stone Lab Diamond Engagement Ring In 18K Yellow Gold, Angle View
    4 Carat Mona Three Stone Diamond Engagement Ring
    $3,650
    Emerald Trillion Cut Three Stone Lab Diamond Engagement Ring In 14K White Gold - Lucenjuri Emerald Trillion Cut Three Stone Lab Diamond Engagement Ring In 14K White Gold, Angle View
    4 Carat Trillion Cut Three Stone Diamond Engagement Ring
    $3,550
    Oval Halo Split Shank Lab Diamond Engagement Ring In 14K Yellow Gold - Lucenjuri Oval Halo Split Shank Lab Diamond Engagement Ring In 14K Yellow Gold, Angle View
    4 Carat Halo Split Shank Diamond Engagement Ring
    $3,950
    A Promise to Last Forever, Crafted Sustainably
    Celebrate your love story with engagement rings that are as meaningful as they are beautiful. Featuring ethically sourced lab grown diamonds, each ring is a testament to your commitment and shared values.
    Your Love, Perfectly Set
    Complete your love story with wedding bands that beautifully complement your engagement ring. From classic designs to modern styles, find the perfect match to celebrate your forever.
    Hand wearing multiple lab grown diamond engagement rings on a light background
    Create Your Dream Engagement Ring
    Bring your vision to life with Lucenjuri’s easy-to-use design tool, making it effortless to craft the engagement ring of your dreams. Start designing today and create a piece as unique as your love story.
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    Looking for something unique? Explore our curated lab diamond engagement rings or bring your vision to life with our custom design options.
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    Customer Reviews

    June 04, 2026
    5 Stars
    It’s perfect
    Mena
    May 11, 2026
    Best experience
    I had the best experience with Lucenjuri! My diamond ring arrived today and it is absolutely stunning. I couldn't stop staring! Can't wait to purchase with them again.
    Maria H.
    May 08, 2026
    10/10 couldn't recommend Lucenjuri enough
    I was sceptical of buying something so personal from a website, I was wrong to think that. The ring was easily as beautiful as the pictures on Lucenjuri website. The customer service was excellent throughout the process. I couldn’t recommend Lucenjuri enough 10/10
    Toni R.
    May 02, 2026
    Great customer service.
    Christine has been absolutely wonderful! She is so helpful with all my questions, very quick to respond, and always provides additional details for important things I didn't even think to ask. So grateful for all her help, it made such a difference!
    Rylee
    April 27, 2026
    5 Stars
    Beautiful ring just what i wanted
    alberto
    April 26, 2026
    Customer for life
    Perfect! My wife loved her ring. I purchased this piece as a combined Valentine’s and 20th-anniversary gift, and it became one of the most meaningful presents I’ve ever given. The website was really easy to navigate, and the pricing was excellent compared to other jewelers. It arrived promptly with all the necessary diamond certification, which gave us great peace of mind. I will definitely be a customer for life.
    Benjamin T.
    April 25, 2026
    5 Stars
    Products were as ordered.
    John
    April 13, 2026
    Exactly as promised
    Excellent customer service! Very easy process to custom what we were looking for. I’m thankful for the prompt assistance and communication. The marquise ring is beautiful and it’s was exactly as promised.
    Zach J.
    April 05, 2026
    Blown Away by Everything!
    Customer service is top notch and the most helpful I have ever experienced. The ring I had ordered got to me at the perfect time. Along with great customer service the product is even more beautiful than I could have imagined. They had earned a life long customer. I will be spreading the word about Lucenjuri and that it is the place to buy all your jewelry!
    Danny M.
    April 02, 2026
    She loves it
    I purchased my fiancée engagement ring from Lucenjuri last month and she loves it. Came in very well-presented and also diamond certificates! I’m very glad I purchased from here.
    Wally

    Experience Sustainable Luxury with Lucenjuri

    Our meticulous attention encompasses every aspect of creation — an unwavering focus on comfort, quality, and durability ensures your cherished piece lasts a lifetime. With precision, quality, and affordability as our cornerstones, we invite you to experience sustainable luxury, directly from us to you.

    • Commitment to Ethical Sourcing

    • Unmatched Quality Craftsmanship

    • Sustainable Luxury, Ethically Crafted

    4 Carat Engagement Rings

    How Big Is a 4 Carat Lab Grown Diamond Engagement Ring?

    A 4 carat lab grown diamond is incredible, measuring approximately 10.2–10.4mm for a round brilliant cut. This is a bold size and one that echoes luxury and presence for brides who want an unforgettable statement piece.

    Why Choose a 4 Carat Lab Diamond Engagement Ring?

    This ring includes all of the elements of luxury, and with lab grown diamonds, there will be more carat for less money, as well as superior cut, clarity, and color, for a price point that is a fraction of similarly seeing mined diamonds. At Lucenjuri, each and every 4 carat diamond is ethically grown, and crafted with care to ensure maximum brilliance. For those who want a truly one of a kind piece, our Artisan Studio offers bespoke customization, where you can collaborate with our master jewelers to create your dream ring.

    Popular 4 Carat Lab Grown Diamond Engagement Ring Styles

    4 Carat Round Diamond Engagement Ring

    The round brilliant cut offers unparalleled sparkle, making it the top choice for brides who love timeless elegance. At 4 carats, the round diamond ring will look extra stunning in either a solitaire or halo setting.

    4 Carat Oval Diamond Engagement Ring

    Oval diamonds are beloved for their finger-flattering shape and larger face-up appearance. A 4 carat oval diamond ring looks stunning in a halo setting, or vintage-inspired setting, and creates an elongated, romantic look.

    4 Carat Princess Cut Diamond Engagement Ring

    The princess cut is extremely stunning at 4 carats and it offers a bold, modern edge. Its sharp facets produce extreme brilliance, especially in sleek solitaire designs or contemporary channel set bands.

    4 Carat Emerald Cut Diamond Engagement Ring

    Emerald cut diamonds have beautiful step facets that elegantly highlight the diamond's clarity, and their sophisticated faceting pattern gives them an beautiful, almost mirror-like sparkle. An emerald cut diamond will look even more elevated with a custom made bezel ring design or a unique east-west setting.

    4 Carat Radiant Cut Diamond Engagement Ring

    For brides looking for a combination of classic glamour with a modern edge, the radiant cut is a perfect fit. At 4 carats, radiant cut diamonds offer beautiful sparkle and wonderful clean edges. A wide variety of luxurious options can be created with diamonds of this size, but when you set it into a hidden halo or design it with three-stone rings, the end results will be stunning!

    Best Engagement Ring Settings for a 4 Carat Lab Grown Diamond

    • Solitaire Settings: A classic way to showcasethe significant size of a center stone.
    • Halo Settings: Add extra sparkle and make the diamond appeareven larger, especially with oval or radiant cut diamonds.
    • Three-Stone Settings: Perfect for balancing the weight of a 4 carat center stone while adding additional sparkle.
    • Bespoke Artisan Studio Designs: From vintage-inspired detailing to fully custom east-west settings, our Artisan Studio can craft a one-of-a-kind design tailored to your style.You dream it, we build it!

    FAQs

    How do I choose the perfect engagement ring?

    Choosing the perfect engagement ring is a personal journey that reflects your unique love story. It’s less about a "formula" and more about intuition. Start by observing. Does your partner gravitate toward vintage charm or sharp, modern lines? Do they wear gold, or is their jewelry box strictly silver-toned? If you're not sure, ask friends or family for help, or even discuss their tastes openly. 

    Once you have the vibe, focus on the diamond. The Four C’s—Carat, Cut, Clarity, and Color—are key factors to consider when choosing your diamond. At Lucenjuri, we have a wide range of lab grown diamonds that are both stunning and sustainable, allowing you to choose the perfect stone for your budget.

    What exactly is a lab grown diamond engagement ring?

    A lab grown diamond is a diamond. It’s not a "simulant" or a "cubic zirconia." It has the exact same chemical and optical DNA as a mined diamond. The only difference? It’s born in a high-tech lab rather than being pulled out of a hole in the ground. It’s the smarter, greener, and more ethical way to do luxury.

    What are the benefits of a lab grown diamond engagement ring?

    The most obvious perk? You get a much bigger, much better diamond for your money. Because we’ve cut out the unnecessary supply chain markups, you aren't paying for "tradition"—you’re paying for the stone. Plus, every one of our diamonds comes with an IGI or GIA certificate, so you have the same verified quality and transparency you’d expect from a high-end jeweler, but with a clear conscience.

    What are some engagement ring setting types?

    With so many gorgeous ring settings, each one yields a different appearance. Some of the most popular options include:

    • Solitaire: The "little black dress" of rings. Simple, elegant, and focused entirely on the diamond.
    • Halo: For when you want that "wow" factor. It wraps the center stone in a circle of smaller diamonds to maximize the sparkle.
    • Three-Stone: Representing your past, present, and future—it’s a sentimental powerhouse.
    • Bezel: My personal favorite for the modern minimalist. It’s sleek, snag-free, and incredibly secure.
    • Toi et Moi: The "You and Me" ring. Two stones, one design—very chic, very romantic.

    How do I choose the right metal for the engagement ring setting?

    Don't overthink it—go with what they already wear. Platinum is the "set it and forget it" metal; it’s incredibly tough and never needs replating. White Gold is the sleek, budget-friendly alternative. Yellow Gold feels warm and soulful (and it’s having a huge fashion moment right now), while Rose Gold is for the romantic who wants something a bit more unique.

    Can I customize my engagement ring?

    Absolutely! Customize is definitely one of our specialty. Through Lucenjuri’s Artisan Studio, we can bring any vision to life. From selecting a specific IGI certified stone to designing a bespoke band from a sketch, we’ll work with you through a CAD preview to ensure every detail is a perfect reflection of your love story.

    How can I stay within my budget?

    Staying on budget is easy when you choose lab grown. Because our diamonds offer more "brilliance for your spend," you don't have to compromise on quality. Our advice: prioritize the Cut (for maximum sparkle) and the Carat (for the look you want), and let us help you find the sweet spot for color and clarity to keep the price exactly where you need it.

    What is the "3-month rule" for engagement rings?

    That "rule" was a marketing invention from the 1940s. We don't subscribe to it. Your ring should reflect your values and your life together, not a corporate sales target. Spend what feels right for you, and with lab diamonds, "comfortable" still looks like "extravagant."

    How much does the average lab grown diamond engagement ring cost?

    One of the best things about the current market is that "luxury" is no longer gated by an astronomical price tag. On average, a high-quality lab grown diamond engagement ring at Lucenjuri ranges from $1,500 to $5,000, depending on the complexity of the setting and the carat weight of the center stone. To put that in perspective, a lab grown diamond typically costs 60% to 80% less than a mined diamond of the exact same quality. This price difference allows you to invest in a much more impressive stone or setting without stretching your finances.

    Are lab grown diamond engagement rings durable enough for everyday wear?

    Yes. Science doesn't lie. A lab diamond is a 10 on the Mohs scale—the hardest material on Earth. It’s not going to scratch, it’s not going to cloud, and it’s not going to break. When you choose a lab diamond, you are choosing a stone that is built to endure.