Lab-Grown Diamond Engagement Rings London | Ethical & Sustainable Luxu – MARLII LAB

Ethical Luxury in the Heart of London

Welcome to MARLII LAB London, where luxury meets responsibility. We offer exquisite lab-grown diamond engagement rings designed for those who value beauty, sustainability, and ethical practices in fine jewellery. Our lab-grown diamonds are the pinnacle of eco-conscious elegance, with every piece crafted to reflect the sophistication and timeless beauty of London’s luxury jewellery scene.

Ember Engagement Ring

Echo Engagement Ring

Solstice Engagement Ring

Lumina Engagement Ring

Unity Pear & Emerald Engagement Ring

Unity Pear Engagement Ring

Ode Radiant Engagement Ring

Ode Oval Engagement Ring

Ode Emerald Engagement Ring

Ode Pear Engagement Ring

Ode Marquise Engagement Ring

Ode Round Engagement Ring

Unity Pear Engagement Ring

Unity Pear & Emerald Engagement Ring

Muse Oval Engagement Ring

Muse Emerald Engagement Ring

Muse Round Engagement Ring

Muse Marquise Engagement Ring

Muse Round Engagement Ring

Muse Pear Engagement Ring

Virtue Emerald Engagement Ring

Virtue Pear Engagement Ring

Virtue Marquise Engagement Ring

Twilight Oval Engagement Ring

Twilight Round Engagement Ring

Twilight Emerald Engagement Ring

Twilight Marquise Engagement Ring

Twilight Round Engagement Ring

Why Choose Lab-Grown Diamonds?

At MARLII LAB, we believe in creating beauty with integrity. Our lab-grown diamonds offer the same brilliance, quality, and durability as mined diamonds—without the environmental cost. Here’s why our ethical engagement rings are a modern choice for the discerning couple:

Sustainable and Eco-Friendly: Produced with significantly reduced environmental impact, lab-grown diamonds preserve natural resources and protect ecosystems.

Exceptional Craftsmanship: Our diamonds are hand-selected for quality, clarity, and colour, resulting in rings that are as beautiful as they are ethical.

Affordable Luxury: Enjoy the freedom to choose larger, high-quality diamonds without compromising on ethics or beauty.

Each lab-grown diamond engagement ring is a masterpiece of quality and sustainability, offering you a luxurious way to celebrate your love.

Discover the Collection

Our collection of lab-grown diamond engagement rings blends classic and contemporary designs with London’s luxury aesthetic. Whether you’re seeking a minimalist solitaire, an elegant halo setting, or something uniquely custom, MARLII LAB London offers an array of designs tailored to your style and values.

Highlights:

Customisable Elegance: Design a ring that reflects your individuality. Choose from a variety of shapes, settings, and metal finishes.
Fine Materials, Ethically Sourced: Each ring is crafted with responsibly sourced gold and diamonds, embodying our commitment to sustainable fine jewellery.
Crafted in London Luxury: Every MARLII LAB ring combines modern design with the precision and detail expected in London luxury jewellery.

DSICOVER YOUR PERFECT RING

Elegant Lab-Grown Diamond Wedding Rings

Exchange vows with our exquisite collection of lab-grown diamond wedding rings. Each piece is meticulously crafted to symbolise your everlasting commitment.

Timeless Styles: Classic, modern, and unique designs to suit every taste.
High-Quality Craftsmanship: Precision and attention to detail in every ring.
Customisation Options: Personalise your wedding rings with engravings, metal choices, and diamond accents.

Browse our elegant sustainable wedding rings and find the perfect match for your special day.

SHOP OUR WEDDING RINGS

Create Your Perfect Ring

At MARLII LAB London, we make the process of designing your custom lab-grown diamond ring seamless and enjoyable.

Consultation: Discuss your vision with our experienced designers.
Design: Collaborate on sketches and select materials that align with your style.
Crafting: Our skilled artisans bring your design to life with precision and care.
Delivery: Receive your bespoke ring, ready to celebrate your love.

Start designing your perfect ethical engagement ring today and make your engagement or wedding truly unforgettable.

BOOK YOUR EXCLUSIVE CONSULTATION

A Personalised, Private Experience

Ready to find the perfect lab diamond ring?

At MARLII LAB London, we offer private consultations to guide you through the process of designing a piece that reflects your story and values. From your initial ideas to the final reveal, our team of jewellery experts ensures every detail is perfected with care.

Central London Boutique opening in June 2025

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Celebrate your love with MARLII LAB London—where timeless beauty and ethical practices unite.

BESPOKE ENQUIRY

At MARLII LAB, we meticulously select diamonds to match each client's unique needs, guaranteeing the finest stone available at any given moment.

Our diamond specialist, driven by a fervent commitment to ethical sourcing, only chooses IGI certified stones that surpass our rigorous standards in terms of colour, clarity, and cut.

To initiate the process, please complete the form below, specifying your preferred carat size and budget. Our dedicated customer service team will respond to your request within 24 business hours.

Please be aware that, due to their unique nature, we cannot accommodate exchanges or returns for bespoke items.