Lab Grown Diamond Necklaces In Platinum

Discover absolute permanence with our platinum lab grown diamond engagement necklaces, boasting a naturally colorless, heavy-weight setting that offers unmatched diamond security.

  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
9 Items
  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
Filter
Explore our curated platinum lab grown diamond necklace collection or bring your unique vision to life with Lucenjuri’s custom design options, crafted to secure your style with a resilient, permanent brilliance.

Customer Reviews

Hear why our customers love Lucenjuri

5 Stars
Absolutely Gorgeous! The diamond is perfect! I reached out to the team and had some pretty specific specs. They went through and found the perfect stone for me and allowed me to choose this specific stone. Their customer service was impeccable. It took about 10 days from ordering to delivery. It was delivered in a beautiful box with the certificate. I’m so glad I found this company!
Ursula
September 21, 2026
5 Stars
Everything went super smooth! Emma was very reassuring and extremely helpful. She responded almost immediately to any questions I had. I received the band and everything is perfection ! My husband loves his upgrade. Will definitely be purchasing from this company again !
ALEXZANDRIA
September 17, 2026
5 Stars
This necklace and company are wonderful! I asked for a custom length made and it was perfect! The stones are clean and sparkly! Love them! Very quick shipping. Christine in customer service is the best; great communication. I would trust no other company for lab created diamonds
Tracy
September 17, 2026
Anniversary gift
Bought this for our 10 year anniversary and it arrived earlier than expected. My wife loved the sparkle right away, and the quality felt much better than anything we saw locally.
Johnny
September 16, 2026
My Perfect Everyday Necklace!
I think I’ve found my perfect everyday necklace! The quality is exceptional, and this is already my second purchase from Lucenjuri. I’m absolutely in love with it and couldn’t recommend them more!
Navya K.
September 08, 2026
Amazing experience
I couldn't be happier with my wedding set from Lucenjuri! The team went above and beyond to help me design the exact ring I wanted. The consultants were patient, kind, and highly communicative throughout the entire process. When the rings arrived, I was absolutely blown away by the gorgeous details and incredible quality. I'm a customer for life!
Shonna W.
September 07, 2026
Perfect anniversary upgrade
My wife had mentioned a toi et moi ring a few times, so I chose this for our anniversary. The radiant and pear stones look amazing together and feel really special.
Chris L.
September 06, 2026
Absolutely Stunning Necklace & Exceptional Service! 💛✨
I’m absolutely in love with my Starry Charm necklace! 😍 It’s even more beautiful in person, and the sparkle is incredible. I ordered the 0.50ct version and was so pleasantly surprised that mine totaled 0.63ct! I upgraded it to 18k gold and the 18K yellow gold is absolutely gorgeous too. A special thank you to Emma, who made the entire experience wonderful. She was incredibly kind, attentive, and helpful throughout the whole process. I’m so happy with both the necklace and the amazing customer service that I’ve already ordered another piece! 💛✨
Navya K.
September 04, 2026
super sparkly!
Among all the jewelry companies I contacted while looking for a necklace, Lucenjuri stood out for its exceptional and sincere customer service. While many other companies filled my inbox with promotional and high-pressure sales emails after I inquired or registered, your team never did that at all.When the necklace arrived, I was absolutely amazed—both the diamond and the chain are truly, incredibly sparkly! I previously ordered a lab-grown diamond necklace from a well-known company with a store in Beverly Hills, but it didn't impress me at all, and I ended up returning it. Buying jewelry online made me feel a bit anxious at first, but any doubts I had vanished the moment I opened your package.Thank you so much, Nicole and Christine, for your kind and thoughtful replies. You made my experience truly unforgettable.
Maiko
September 03, 2026
Sleek and beautiful
I wanted the Myra with a different band and the process was easier than I expected. The finished ring has a sleek look and the diamond sparkles beautifully.
Dorine S.
August 23, 2026
Competitive Pricing
Lifetime Warranty
Free Shipping
Free Returns

Platinum Lab Grown Diamond Necklaces

There is an incredible sense of permanence that comes with a platinum setting. Our collection of platinum lab grown diamond necklaces delivers a dense, substantial weight and a natural, icy white brilliance that represents the absolute peak of fine jewelry craftsmanship. We set our ethical, sustainably grown diamonds straight into this premium noble metal, giving you uncompromised wardrobe pieces that offer lifelong durability, a rich physical presence, and a pure white shine that will never fade.

The Unmatched Strength of a Platinum Frame

Choosing a platinum lab grown diamond necklace is the ultimate way to prioritize long-term security and pure metal luxury. Platinum is naturally white and completely hypoallergenic, making it the perfect precious metal choice for anyone with sensitive skin.

Because platinum is an incredibly dense, malleable metal, it doesn't wear away or lose volume over time like gold alloys can. Instead, a platinum setting provides a highly secure, permanent hold that grips the delicate facets of our GIA and IGI-certified stones with maximum strength, ensuring your lab grown diamond pendant necklace stays safe for generations.

Explore Our Platinum Necklace Layouts

We design our signature platinum settings across a few classic silhouettes so you can find a flawless match for your personal aesthetic. For a clean, everyday signature, a 1 carat lab grown diamond necklace set in a bright platinum prong configuration provides a delicate, floating drop of pure light.

If you are looking for a more commanding, light-catching presence, stepping up to a 2 carat lab grown diamond necklace with a crisp platinum-set halo layout creates a gorgeous, expansive feel. From the smooth, modern borders of our low-profile bezels to the classic structure of a lab grown diamond cross necklace, this naturally white metal brings an elite, contemporary elegance to every single diamond cut.

Complete Your Fine Jewelry Collection

A platinum lab diamond necklace serves as the ultimate, brilliant anchor for a luxury jewelry edit. To keep your aesthetic perfectly sharp and seamless, we love matching these naturally bright white tones across your entire look. You can easily pair your pendant with our responsibly crafted platinum lab grown diamond earrings, or layer it alongside a fluid, high-prestige tennis bracelet.

Shop Your Platinum Lab Diamond Necklaces at Lucenjuri Today

Ready to find the perfect sparkling match for your collection? Explore our premium selection of naturally white, hypoallergenic designs and shop your platinum lab diamond necklaces at Lucenjuri today to complete a beautifully synchronized look.

FAQs

Will a platinum lab diamond necklace ever change color or turn yellow?

No, platinum is naturally white and will never fade, tarnish, or change color over time. Unlike white gold, which relies on a surface rhodium plating to hide its natural yellow undertone, platinum's icy white luster runs entirely through the solid metal composition. This means your necklace will never require replating to maintain its bright modern shine.

What is the difference between white gold and platinum necklaces?

The main difference is that platinum is naturally white, significantly heavier, and more durable than white gold, which is a lightweight alloy that requires occasional replating. While white gold offers a beautiful, highly reflective finish at a lower starting investment, platinum is highly prized by collectors for its pure metal weight, hypoallergenic properties, and lifelong prong security.

What is the signature patina that develops on platinum jewelry?

Over time, daily wear will cause platinum to develop a soft, satin-like finish known as a patina, which many fine jewelry lovers highly prize. This happens because daily scratches don't scrape the metal away; they simply displace it across the surface. If you prefer a crisp, mirror-like modern shine, a quick professional buffing instantly restores its original polished sheen.

Is a platinum necklace safe for highly sensitive skin?

Yes, platinum is completely hypoallergenic because it is used in a highly pure state (typically 95% pure), making it entirely safe for sensitive skin. It contains zero nickel or common base-metal allergens found in gold alloys, providing an incredibly clean, comfortable, and irritation-free feel against the skin for daily wear.

How should we clean a platinum lab grown diamond necklace at home?

The best way to clean your platinum necklace is a brief soak in warm water with mild dish soap, followed by a gentle scrub with a soft toothbrush. This simple styling habit quickly lifts away daily oils, makeup, and lotions that block the light channels under the settings, instantly unlocking the maximum fire of your certified diamonds and the bright luster of your platinum framework.