Your new item is valuable and could be lost, stolen or damaged. Would you like to be able to come back to us for repair and replacement as close as possible to the original item.
If so, then Assetsure Valuable item insurance may be for you.
What's covered
  • Accidental Loss.
  • Accidental Damage.
  • Theft including Mugging.
  • Accidental Loss.
  • No Excess to pay if you have a claim.
Main Exclusions
  • Loss or damage occurring outside of the United Kingdom if you have been, or intend to be, away from the United Kingdom for more than 60 consecutive days.
  • Scratching, denting or cosmetic only damage.
  • Any loss or damage to Jewellery and Watches away from either your home or another private dwelling in the UK where you are staying temporarily, unless the item is: a) worn by you, or b) carried under your close personal control, or c) Kept in a locked safe, or d) Kept in a locked gym locker whilst you remain on the gym premises.
To be eligible for the Assetsure policy you must be able to confirm the following:
  • You are over 21 Years of Age.
  • You are normally resident in the United Kingdom.
  • You or the wearer of any item have no unspent Criminal Convictions.
For full terms and conditions please click here.
Important Note
You need to satisfy that this product is suitable for you and ensure that you do not already have insurance covering similar risks.
Important Note Demands & Needs
We do not specifically recommend products; You need to satisfy that this product is suitable for you and ensure that you do not already have insurance covering similar risks. This product meets the demands and needs of those who wish to ensure that their Jewellery is protected against a wide range of perils, such as accidental damage, theft and accidental loss.
Your premium includes insurance premium tax at the current rate
This insurance policy is arranged and sold by Assetsure which is a trading name of Hildon Park Limited. Hildon Park Limited are authorised and regulated by the Financial Conduct Authority under reference number 592997 to carry out the distribution of insurance products.
FREE WORLDWIDE DELIVERY 30 DAY RETURNS / 60 DAY EXCHANGE 5 YEAR WARRANTY 0% APR FINANCE UK HANDCRAFTED
FREE WORLDWIDE DELIVERY 30 DAY RETURNS / 60 DAY EXCHANGE 5 YEAR WARRANTY 0% APR FINANCE UK HANDCRAFTED

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WHAT ARE YOU LOOKING FOR?

Channel Set Diamond Necklaces

Seeking a superlative and glamorous gift for a loved one? Our sparkling Channel Set Diamond Necklaces never fail to make an everlasting impression of affection and esteem.

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Diamond Heart Pendant Necklace 0.03ct 9K White Gold
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Diamond Heart Pendant Necklace 0.03ct 9K White Gold

Item Ref: G3876

AVAILABILITY: In stock (12 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

A sparkling diamond heart is a beautiful way to say I love you. Any girl would be smitten with this romantic necklace. The gorgeous 0.03CT premium quality diamond is set into polished UK hallmarked white gold. It catches the light...

£199

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Lab Diamond Cross Pendant Necklace Channel Set 0.25ct H/Si in 9K Gold
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Lab Diamond Cross Pendant Necklace Channel Set 0.25ct H/Si in 9K Gold

Item Ref: NDG5239

AVAILABILITY: In stock (6 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

If you're looking for an elegant gift for someone you love, this luxurious diamond cross pendant is a beautiful choice. Handcrafted with sustainable lab grown diamonds in a fine yellow gold channel setting, it sparkles stunningly whenever it catches the...

£369

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Heart Pendant Necklace 0.03ct Diamond 18K White Gold
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Heart Pendant Necklace 0.03ct Diamond 18K White Gold

Item Ref: R4621

AVAILABILITY: Out of Stock

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

This beautiful necklace is sure to make her heart melt, with a whimsical, classically romantic design, 18K white gold and a Premium Quality Diamond, this necklace would be a truly touching gift. The necklace features a round cut 0.03CT Premium...

£265

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Lab Diamond Cross Necklace Channel Set 0.25ct H/Si in 9K White Gold
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Lab Diamond Cross Necklace Channel Set 0.25ct H/Si in 9K White Gold

Item Ref: NDG5239Y

AVAILABILITY: In stock (3 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

If you're looking for a beautiful jewellery gift for someone special, this luxurious diamond cross pendant is a perfect choice. Handcrafted with sustainable lab grown diamonds in a polished white gold channel setting, it sparkles stunningly whenever it catches the...

£369

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1ct Lab Diamond Cross Necklace Pendant H/Si Channel Set in 9K Gold
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1ct Lab Diamond Cross Necklace Pendant H/Si Channel Set in 9K Gold

Item Ref: NDG5240

AVAILABILITY: In stock (4 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Spoil the special someone you love with this exquisitely sparkling cross necklace which features sustainable lab grown diamonds. With a beautiful yellow gold setting to provide a look of timeless luxury, it's a classic gift for any occasion. *The sustainable...

£699

From £23.52 per month

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Cross Pendant Necklace 0.25CT Diamond 9K Yellow Gold W13 x L20mm
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Cross Pendant Necklace 0.25CT Diamond 9K Yellow Gold W13 x L20mm

Item Ref: G3872

AVAILABILITY: In stock (0 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Spoil the woman you love with this fine looking diamond encrusted cross pendant which features 0.25CT of Premium Quality Diamonds in a classic cross design with a 9K yellow gold border. We also have a matching half eternity ring if...

£489

From £16.45 per month

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Heart Pendant Necklace 0.33ct Diamond 9K White Gold
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Heart Pendant Necklace 0.33ct Diamond 9K White Gold

Item Ref: G3886

AVAILABILITY: In stock (4 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

This luxurious diamond heart pendant looks stunning with elegant baguette cut diamonds. In a contemporary twist on a classic design, the chain weaves in and out of the pendant for a unique look. A highly rated gift that will make...

£675

From £22.71 per month

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0.50ct Lab Diamond Heart Pendant Necklace H/SI Quality in 9K Yellow Gold
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0.50ct Lab Diamond Heart Pendant Necklace H/SI Quality in 9K Yellow Gold

Item Ref: NDG5258

AVAILABILITY: Out of Stock

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our 0.50ct Lab Diamond Heart Pendant Necklace H/SI Quality set in the finest 9K recycled yellow gold. A delicate heart pendant hangs from a subtle gold vermeil chain on the neckline, the cut-out nature of the charm allowing skin...

£315

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1ct Lab Diamond Cross Necklace Pendant H/Si Channel Set 9K White Gold
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NEW IN

1ct Lab Diamond Cross Necklace Pendant H/Si Channel Set 9K White Gold

Item Ref: NDG5240Y

AVAILABILITY: In stock (1 item)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

This beautiful diamond cross necklace features sustainable lab grown diamonds in a high diamond grade that creates spectacular scintillation and fire. Highly polished white gold provides a flawless, contemporary setting. An excellent gift idea for any celebration. *The sustainable luxury...

£699

From £23.52 per month

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0.50ct Lab Diamond Heart Pendant Necklace H/SI Quality in 9K White Gold
NEXT DAY DELIVERY
NEW IN

0.50ct Lab Diamond Heart Pendant Necklace H/SI Quality in 9K White Gold

Item Ref: NDG5258Y

AVAILABILITY: In stock (1 item)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

Discover our 0.50ct Lab Diamond Heart Pendant Necklace H/SI Quality set in the finest 9K recycled white gold. A delicate heart pendant hangs from a subtle silver chain on the neckline, the cut-out nature of the charm allowing skin to...

£315

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Cross Pendant Necklace 0.25CT Diamond in 9K White Gold
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NEW IN

Cross Pendant Necklace 0.25CT Diamond in 9K White Gold

Item Ref: G3861

AVAILABILITY: In stock (4 items)

PRODUCT TYPE: Necklaces

VENDOR: The Diamond Store

The 0.25CT of sparkling Premium Quality Diamonds are held in a channel setting in this exceptional diamond cross pendant. The cross pendant is W13 x L20mm and has been lovingly handcrafted and hallmarked in the UK.

£489

From £16.45 per month

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Professional Jeweller Awards 2022 Winner
Professional Jeweller Awards 2023 Finalists
The United Kingdom Weddings and Honeymoons Awards 2024 Finalists
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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 Warranty.

We stand by the quality of our jewellery. That’s why all our pieces come with a 5-year warranty 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!

REQUEST YOUR RING SIZER

HERE'S A STEP BY STEP GUIDE TO MEASURING YOUR RING SIZE AT HOME.

Watch the video below for our step-by-step guide to using your ring sizer. Just push one end through to make a loop, slip it onto your finger, adjust until it feels snug, and note your size.

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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