Crafting Timeless Treasures

Welcome to Precious Lab, Your Gateway to Modern Luxury

At Precious Lab, we blend ethical lab-grown diamonds with timeless Japanese craftsmanship to make luxury personal, accessible, and uniquely yours.

Inspired by Love, Crafted with Care
The Birth of Precious Lab

Precious Lab was founded in Tokyo, Japan, by a team of experienced jewelers and tech innovators who shared a simple dream—to make diamond jewelry more accessible while preserving the beauty, quality, and craftsmanship people love. With three decades of jewelry expertise, we set out to offer something modern and meaningful: lab-grown diamonds that shine as brilliantly as mined ones, at prices for every budget.

We truly believe lab-grown diamonds are the future of fine jewelry—a perfect balance of sustainability, technology, and timeless elegance.

Our vision is to make diamonds and fine jewelry not only more accessible but also more personal and meaningful for everyone. By blending modern technology, ethical practices, and traditional Japanese craftsmanship, we create jewelry that’s sustainable, innovative, and deeply personal. At Precious Lab, we’re here to help you design pieces that feel truly yours.

Our vision

Diamonds for Everyone, Crafted Your Way

explore diamonds

Where Craftmanship Meets Meaning

We are proud to be an SCS-007 certified retailer, recognized for meeting the highest standards in sustainability, climate neutrality, and ethical practices in the diamond industry. This certification is your assurance that our diamonds are responsibly produced and transparently sourced.

What We Offer

Quality: Highest standards of Japanese craftsmanship and ethically sourced lab-grown diamonds
Innovation: Modern design tools, including our Custom Engagement Ring Builder, for a truly unique creation
Authenticity: Clear pricing, certified sustainability, and an authentic approach to fine jewelry backed by trusted certifications.
Quality Craftsmanship
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Personal Design
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Ethical Brilliance
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Modern Luxury
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Quality Craftsmanship
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Personal Design
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Ethical Brilliance
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Modern Luxury
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Quality Craftsmanship
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Personal Design
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Ethical Brilliance
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Modern Luxury
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Quality Craftsmanship
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Personal Design
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Ethical Brilliance
♦
Modern Luxury
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Quality Craftsmanship
♦
Personal Design
♦
Ethical Brilliance
♦
Modern Luxury
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Quality Craftsmanship
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Personal Design
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Ethical Brilliance
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Modern Luxury
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SCS-007 CERTIFIED RETAILER •

Core Values

At Precious Lab, we believe lab-grown diamonds are the future of fine jewelry—offering the same brilliance, durability, and beauty as mined diamonds, but at a fraction of the cost and environmental impact. We are committed to exceptional quality in every piece, using only hand-picked lab-grown diamonds from trusted suppliers and crafting each design with the highest standards of Japanese precision. Our focus on customer experience ensures a seamless, transparent, and enjoyable journey—from customizing your engagement ring to receiving the finished piece. By combining accessible pricing with uncompromising craftsmanship, we make modern luxury available to everyone, without sacrificing beauty, ethics, or quality.

Contact us

Discover Your Perfect Sparkle

Explore Our Creations or Design Your Own

We could keep talking about quality, craftsmanship, and sustainability… but we’d rather let the jewelry do the convincing. With our Custom Engagement Ring Builder, you can design a ring that’s completely your own—choose the diamond, the setting, the style. Explore the collection today and start creating a piece that tells your story.

design your own ring

Precision jewelry with modern technology

Made in Japan, Crafted for You

Precision Engineering

We use the latest 3D modeling technology to design each ring from scratch. Every ring basket is custom-built using exact measurements from the diamond’s certificate, ensuring a perfect fit for your unique stone.

Lasting Quality

By crafting each setting to match the diamond’s dimensions, we achieve unparalleled precision. This reduces the risk of the center stone loosening over time, giving you jewelry designed to last for generations.

Premium Materials

All our pieces are made exclusively in K18 Gold and Platinum 950, metals chosen for their durability and beauty. Paired with lab-grown diamonds of G color and VS+ clarity, every creation meets the highest quality standards.

Trusted Sourcing

We work only with certified, reputable manufacturers for both metals and lab-grown diamonds. This ensures every stone on our platform is ethically sourced, responsibly produced, and carefully curated for you.

Real stories from people who chose Precious Lab

The Precious Lab Experience

Your trust matters — here’s what people are saying about our quality, service, and custom designs.

Free Worldwide Shipping

We offer free worldwide shipping on every order, fully insured for peace of mind from our door to yours.

Lifetime Repair Service

Enjoy lifetime free services including resizing, polishing, and prong re-tipping—because your jewelry deserves lasting care.

Certified Diamonds

Every diamond comes with an IGI or GIA certificate to guarantee quality, authenticity, and transparency.

Beautifully Boxed, Always

Your jewelry deserves the best. Our custom boxes keep every piece safe while adding a touch of luxury to your unboxing.