FREE WORLDWIDE DELIVERY 30 DAY RETURNS / 60 DAY EXCHANGE 5 YEAR GUARANTEE 0% APR FINANCE UK HANDCRAFTED
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Lab Diamond Heart Pendant Necklace 0.25ct H/Si in 9K Gold
NEXT DAY DELIVERY
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Lab Diamond Heart Pendant Necklace 0.25ct H/Si in 9K Gold

Item Ref: NDG5230

AVAILABILITY: In stock (60 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

If your sweetheart adores romantic diamond jewellery then they'll fall head over heels for this dainty heart pendant. It showcases sparkling, sustainable lab grown diamonds, set in luscious yellow gold with a milgrain edge for a touch of vintage elegance....

£299

Pay in 3 interest-free

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Emerald 0.54CT And Diamond 9K Yellow Gold Heart Pendant Necklace
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Emerald 0.54CT And Diamond 9K Yellow Gold Heart Pendant Necklace

Item Ref: G4798

AVAILABILITY: In stock (15 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

This heart shaped emerald pendant and necklace has a timeless design which ensures it will be treasured forever. The pendant features 0.54CT of rich emeralds and 0.03CT of glistening Premium Quality Diamonds which combine to make a truly heart-warming necklace.

£279

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Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 1.00ct H/SI in 9K Gold
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Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 1.00ct H/SI in 9K Gold

Item Ref: NDD3558-322JUA

AVAILABILITY: In stock (9 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our Wanderlust Floating Heart Diamond Solitaire Pendant Necklace, featuring a 1.00ct lab-grown heart-shaped diamond, suspended from a fine 9k yellow gold chain. This necklace is a modern taken on a classic pendant necklace, with the suspension hidden behind the...

£719

From £25.6 per month

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Diamond Heart Necklace 0.20ct Channel Set in 9K Gold
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Diamond Heart Necklace 0.20ct Channel Set in 9K Gold

Item Ref: G4137

AVAILABILITY: In stock (16 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Give a romantic gift or add a sophisticated touch to your look with this stunning diamond heart necklace. The pendant features glistening premium diamonds that contrast beautifully against lush yellow gold. Includes a chain in a choice of 3 different...

£309

From £11.0 per month

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Horizon Heart Cut Lab Diamond Solitaire Necklace 0.50ct H/SI in 9K Gold
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Horizon Heart Cut Lab Diamond Solitaire Necklace 0.50ct H/SI in 9K Gold

Item Ref: NDD3567-72JUA

AVAILABILITY: In stock (3 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our Bezel Heart Cut Lab Diamond Solitaire Necklace in 9K Gold, showcasing a 0.50ct H/SI quality lab-grown diamond set in the finest recycled 9k yellow gold. This piece is a refined, modern take on the classic pendant, with the...

£479

From £17.05 per month

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Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 2.00ct H/SI in 9K Gold
NEXT DAY DELIVERY
New

Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 2.00ct H/SI in 9K Gold

Item Ref: NDD3558-422JUA

AVAILABILITY: In stock (7 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our Wanderlust Floating Heart Diamond Solitaire Pendant Necklace, featuring a 2.00ct lab-grown heart-shaped diamond, suspended from a fine 9k yellow gold chain. This necklace is a modern taken on a classic pendant necklace, with the suspension hidden behind the...

£1,349

From £48.03 per month

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Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 0.50ct H/SI in 9K Gold
NEXT DAY DELIVERY
New

Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 0.50ct H/SI in 9K Gold

Item Ref: NDD3558-72JUA

AVAILABILITY: In stock (8 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our Wanderlust Floating Heart Diamond Solitaire Pendant Necklace, featuring a 0.50ct lab-grown heart-shaped diamond, suspended from a fine 9k yellow gold chain. This necklace is a modern taken on a classic pendant necklace, with the suspension hidden behind the...

£485

From £17.27 per month

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Horizon Heart Cut Lab Diamond Solitaire Necklace 0.25ct H/SI in 9K Gold
NEXT DAY DELIVERY
New

Horizon Heart Cut Lab Diamond Solitaire Necklace 0.25ct H/SI in 9K Gold

Item Ref: NDD3567-47JUA

AVAILABILITY: In stock (1 item)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our Bezel Heart Cut Lab Diamond Solitaire Necklace in 9K Gold, showcasing a 0.25ct H/SI quality lab-grown diamond set in the finest recycled 9k yellow gold. This piece is a refined, modern take on the classic pendant, with the...

£339

From £12.07 per month

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Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 1.50ct H/SI in 9K Gold
NEXT DAY DELIVERY
New

Wanderlust Floating Heart Cut Lab Diamond Solitaire Necklace 1.50ct H/SI in 9K Gold

Item Ref: NDD3558-372JUA

AVAILABILITY: In stock (1 item)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our Wanderlust Floating Heart Diamond Solitaire Pendant Necklace, featuring a 1.50ct lab-grown heart-shaped diamond, suspended from a fine 9k yellow gold chain. This necklace is a modern taken on a classic pendant necklace, with the suspension hidden behind the...

£995

From £35.42 per month

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Diamond Galileo Heart 1.10CT Pendant Necklace in 18K Gold - R4653
NEXT DAY DELIVERY
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Diamond Galileo Heart 1.10CT Pendant Necklace in 18K Gold - R4653

Item Ref: R4653

AVAILABILITY: In stock (2 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Make her smile on her special occasion with this gorgeous diamond heart pendant. It features stunning, sparkling H/Si quality diamonds in a heart shaped cluster, beautifully complemented by an 18K yellow gold setting.

£2,295

From £81.71 per month

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Butterfly Mark
Professional Jeweller Awards 2022 Winner
Professional Jeweller Awards 2023 Finalists
The United Kingdom Weddings and Honeymoons Awards 2024 Finalists
Member of the National Association of Jewellers
OUR COMPANY
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CUSTOMER SERVICE

Copyright © 2025. All Rights Reserved.
| Registered in England and Wales Co No. 05736216
Regalian Ltd t/a The Diamond Store is a credit broker for the purpose of introducing credit provided by the lender Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, Authorised and Regulated by the Financial Conduct Authority, and PayPal Credit is provided by PayPal. PayPal Credit is a trading name of PayPal UK Ltd, 5 Fleet Place, London, United Kingdom, EC4M 7RD. Regalian Ltd is authorised and regulated by the Financial Conduct Authority with registration number 731102. are Authorised and Regulated by the Financial Conduct Authority. We are a credit broker, not a lender – credit is subject to status and affordability, and is provided by a panel of lenders of whom we have a commercial relationship. Terms & Conditions Apply. Credit is provided subject to age and status. Minimum spend applies. PayPal Pay in 3: PayPal Pay in 3 is not regulated by the Financial Conduct Authority. Pay in 3 eligibility is subject to status and approval. 18+. UK residents only. Pay in 3 is a form of credit, may not be suitable for everyone. Use may affect your credit score or make credit less accessible or more expensive for you. Consider if affordable for you. See product terms for more details.

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Our Returns Policy

We want you to feel completely confident when you shop with us. That’s why we offer FREE 30-day returns for refunds and 60-day exchanges across the UK and Northern Ireland.

If you’ve ordered a ring smaller than a size J or larger than a size Q, don’t worry — these are custom sizes, but we’re still happy to offer a free exchange or resizing if the fit isn’t quite right.

Cancelling an Order Before Dispatch

Changed your mind? No problem — you can cancel your order anytime before it’s been dispatched.

Just reach out to our friendly team via Live Chat, by email at customerservice@thediamondstore.com, or give us a call on 0345 084 1200 (or +44 345 084 1200 if calling from outside the UK). Please have your order number handy to help us assist you as quickly as possible.

Product Measurements

Please note that for rings smaller than size J or larger than size Q, the width may vary slightly (up to 10%) due to the crafting process. If you need any adjustments, we’re happy to help.

Damaged or Defective Items

If your item arrives damaged or defective, we’ll make it right — fast. We’ll either repair or replace it at no cost to you, or provide a refund once it’s been assessed by our head jeweller.

Our standard returns policy is 30 days to return, and 60 days to exchange.

Our 5 Year Guarantee.

We stand by the quality of our jewellery. That’s why all our pieces come with a 5-year guarantee against defects in materials or craftsmanship. Every item is also fully hallmarked according to UK legislation, confirming its authenticity and origin.

How Refunds Work

Once we’ve received and inspected your returned jewellery, we’ll process your refund right away and email you to confirm. Depending on your bank or payment provider, it may take 3 to 5 working days to show up on your statement.

We’ll always refund you via the same method you used to make your purchase — whether that was credit or debit card, PayPal, Pay4Later Finance, bank transfer, or another option.

To avoid delays, make sure to include the returns label print-out with your parcel. This helps us identify your return quickly.

Ethically Sourced Diamonds

We’re proud to say that all our diamonds are conflict-free and fully compliant with United Nations regulations. When you buy from us, you’re choosing ethical beauty.

Need Help? Get in Touch

We’re here whenever you need us.

📧 Email us: customerservice@thediamondstore.com or returns@thediamondstore.co.uk

📞 Call us: 0345 084 1200 (UK) or +44 345 084 1200 (International)

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RING SIZES & RINGS SIZERS

WHAT IS RING SIZE?

‘Ring size’ is a measurement that refers to the inside circumference of a ring. It’s important to know your correct ring size before buying a ring, otherwise it won’t fit properly.

Different countries use different standardised systems for denoting ring size.

On the right, there’s a chart with the 3 most common ring size systems used in UK, USA and internationally. For Australian sizes simply refer to the UK sizes, which are the same.

WHY USE A RING SIZER?

Ring size is one of those things we think we’ll always remember… but never actually do!

It is very important to find out the correct ring size whether the ring is for you or another person. This measurement enables us to provide you with a perfectly fitting ring. A ring that is so small you cannot get it on – or so big it falls off – can really ruin a big moment!

OUR RING SIZER APP

Our free Ring Sizer App is accurate and easy to use!

Find out a ring size in UK, EU or USA measurements. All sizes F – Z included, from smallest to largest finger.

Simply place your loved one’s existing ring on your phone screen, then adjust the circle until it fits the inside of the ring exactly.

This app helps you keep an engagement ring or a special gift a surprise and saves you a trip to the jewellers.

apple download
Google download

CROSS CHECKING AN EXISTING RING

If you have a printer and an existing ring (or measurement) then print this PDF and use it in conjunction with our app.
DOWNLOAD RING SIZER GUIDE

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