Is any of your jewellery plated?

Personalised bracelets

Genuine Lab Grown
Diamonds

9–18 Carat
Solid Gold

Waterproof &
Tarnish Free

Hypoallergenic
Sensitive Skin

London
Made to Last

Diamond Necklaces

Explore lab-grown diamond necklaces crafted in solid gold.

15 products

Sort

2.24ct diamond trilogy pendant styled with chain on model; chain pictured for illustration #metal_9ct-white-gold

2.24ct Lab-Grown Diamond Trilogy Pendant in 9ct White Gold

GeMMs & Co.

£549.00

18.58ct pear-cut lab-grown diamond tennis necklace 9ct white gold on cream #metal_9ct-white-gold

18.58ct pear-cut lab-grown diamond tennis necklace styled on model #metal_9ct-white-gold

18.58ct Pear-Cut Lab-Grown Diamond Tennis Necklace in 9ct White Gold

GeMMs & Co.

£6,499.00

39.25ct round brilliant lab-grown diamond line necklace in 9ct rose gold on cream #metal_9ct-rose-gold

39.25ct 9ct rose gold lab-grown diamond line necklace styled on model #metal_9ct-rose-gold

39.25ct Lab-Grown Diamond Line Tennis Necklace in 9ct Rose Gold

GeMMs & Co.

£9,499.00

Three-Prong Lab-Grown Diamond Tennis Necklace

GeMMs & Co.

from £3,499.00

Graduated Crown-Set Lab-Grown Diamond Tennis Necklace

GeMMs & Co.

from £4,199.00

Graduated Lab-Grown Diamond Tennis Necklace

GeMMs & Co.

from £3,999.00

Classic round solitaire pendant necklace in 9ct White Gold on cream satin #metal_9ct-white-gold

Classic round solitaire pendant necklace in 9ct White Gold worn on model #metal_9ct-white-gold

Classic Lab-Grown Diamond Solitaire Pendant Necklace in 9ct & 18ct Gold

GeMMs & Co.

from £349.00

Lab-Grown Diamond Pear-Cut Solitaire Pendant Necklace in 9ct White Gold #metal_9ct-white-gold

Pear-cut solitaire pendant necklace styled image #metal_9ct-white-gold

Lab-Grown Diamond Pear-Cut Solitaire Pendant Necklace in 9ct Gold

GeMMs & Co.

from £499.00

Floating solitaire necklace in 9ct White Gold on cream background #metal_9ct-white-gold

Floating solitaire necklace in 9ct White Gold worn on model #metal_9ct-white-gold

Floating Lab-Grown Diamond Solitaire Necklace in 9ct Gold

GeMMs & Co.

from £349.00

41.77ct Lab-Grown Diamond Multi-Shape Tennis Necklace in 9ct White Gold

GeMMs & Co.

£8,499.00

9.55ct Lab-Grown Diamond Graduated Three-Prong Tennis Necklace in 9ct Yellow Gold

GeMMs & Co.

£3,299.00

12.08ct Lab-Grown Diamond Three-Prong Tennis Necklace in 18ct White Gold

GeMMs & Co.

£6,999.00

Lab-Grown Diamond Three-Prong Tennis Necklace in 9ct Yellow Gold

GeMMs & Co.

from £3,599.00

0.35ct Lab-Grown Diamond Circle of Life Necklace in 9ct White Gold

GeMMs & Co.

£458.00

0.35ct Lab-Grown Diamond Circle of Life Necklace in 9ct Yellow Gold

GeMMs & Co.

£458.00

LUXURY
PACKAGING

Beautifully presented, just for you.

Your jewellery arrives in our signature GeMMs & Co. packaging, ready to open, love and treasure.

GeMMs & Co. signature pink jewellery bag and box

FAQs

No. We pride ourselves on providing only 925 hallmarked sterling silver and cubic zirconia jewellery. This is why your GeMMs & Co. piece is such a valuable and sustainable investment.
Read more about it in our ‘Spotlight on Silver’ blog piece https://gemmsandco.com/blogs/our-blog/why-silver

DIAMOND STORIES & STYLE

The GeMMs Journal

Inspiration, jewellery styling and beautiful details worth knowing.

20 October 2026

The Tennis Bracelet Is Back: How to Choose and Style Yours in 2026

The diamond tennis bracelet has moved far beyond formal occasions. Here is how to choose a design that feels modern, wearable and unmistakably...

Read the story

19 October 2026

Planning a Christmas Proposal? Your Lab-Grown Diamond Ring Checklist

A Christmas proposal should feel personal, not rushed. This practical checklist covers the diamond, setting, solid gold, sizing and questions to settle before...

Read the story

14 October 2026

The One-Necklace Rule: How to Style a Diamond Pendant in Autumn 2026

This autumn, jewellery is becoming more confident and personal. Here is how one beautifully chosen diamond necklace can transform knitwear, tailoring and evening...

Read the story

Real customer reviews

Customers reviews

★★★★★

I cannot wait to give the beautiful dog crystal pendant as a gift to someone who is in love with her pet. It is such a stunning piece of jewellery as it is delicate and understated. It’s made even more unique because the red jewel makes the whole thing pop. Lovely website, easy to use, and really well priced.

Linda Vallins
Waddhurst, United Kingdom

★★★★★

Totally love this website beautiful colours and set up. The earrings I ordered arrived less than 24 hours later was not expecting the cute little box and the packaging everything is done with taste and class, earrings were perfect, just as seen on website and very reasonable pricing too
Thank you
Yael K
London, England

★★★★★

I ordered 2 pendants on chains from GeMMs & Co. and was really pleased. The necklaces are gorgeous. The price was very reasonable and the packaging was beautiful. I would highly recommend checking out the website and buying an item of jewellery to treat yourself or as a gift.
Rivka R
London, United Kingdom

★★★★★

Hi
Just a small note to say thanks.
From the ordering to receiving the parcel, everything was so clear and user-friendly.
The beautiful pink pouch really adds a lovely touch
Rivka P
London , United Kingdom

★★★★★

Very quick, within 48 hours of ordering the order I made was received. I ordered for my mother she loved the necklace and bracelet, packaging on point.
Mendel R
London, United Kingdom

★★★★★

I purchased the circle of life necklace as a gift for my wife, and it turned out to be a fantastic choice. She absolutely loves it! The moment she laid eyes on it, her face lit up with joy. The necklace's beauty and craftsmanship truly captured her heart. It's a gift that brought happiness and made a lasting impression. Thank you for creating such a wonderful piece!
E G
London, United Kingdom

★★★★★

Just wow, first of all the website is fresh n easy to use! The products/pictures are just amazing! I love my new stuff and i cant wait to buy more..oh yea and customer services is TOP!
Shaindel N
London, United Kingdom

★★★★★

Affordable but stylish, pieces to wear constantly and beautifully, day or night. I bought the lotus bracelet and find it to sparkle gorgeously and is easy to care for. The photographs are professionally taken and show the beauty of the jewellery. Definitely a shop to keep an eye on.
Betsy D
London, United Kingdom

★★★★★

Really pretty bracelet for my granddaughter, beautiful wrapping, efficient delivery process. Very pleased, thank you
Judy R
London, United Kingdom

Read all reviews on Trustpilot

Free UK delivery

Free delivery available on all orders.
Next day delivery available

925 Sterling Silver

Look for the hallmark that is on each of our products as a quality indicator.

Waterproof

Our products are shower safe but not chlorine proof so remove before swimming.

Sustainable

Our jewellery packaging is beautifully and sustainably made and convenient for home and on the go.