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Sell diamonds for cash UK, sell diamond ring, jewellery, engagement ring, scrap diamonds, we buy diamonds,

Call now on 020 ­8446 8538
or email us at

Featuring probably the world’s first
online diamond price calculator

We will purchase any diamond from 0.01ct -10.00ct

Just follow these three simple steps:

1. Fill in the form below to request a diamond pack
Please note: The calculator is for single diamonds only

2. Send us your diamond by secure delivery or visit us at our premises in North London

3. We evaluate the diamond and send you the cash

Diamond ring Diamond Diamond ring

Fill in all the details below, to get an instant cash price for your diamond

Diamond weight (Ct) Please enter only the weight of individual diamonds, not a total weight of assorted diamonds. A diamond's weight is measured in what is known as a 'carat', which is a small unit of measurement equal to 200 milligrams. Carat is not a measure of a diamond's size, since cutting a diamond to different proportions can affect its weight.
Click to select shape    
Diamond Shape Diamonds come in all shapes imaginable and diamond cutters are still experimenting to discover more. A diamond cutter's skill will produce a diamond of the greatest size with the fewest flaws and the most brilliance from the rough stone.
Diamond Colour Diamonds graded D - F are the rarest and most expensive, whereas the ones graded G - J are seemingly colourless to the untrained eye. Diamonds with grades K - Z are more noticebly yellower.
Diamond Clarity A diamond's clarity is a measurement of the amount of blemishes (external flaws) or inclusions (internal flaws) a diamond contains.
Diamond Certification A diamond certificate is a report created by a team of gemologists, also known as a diamond grading report, diamond dossier or a diamond quality document.
Diamond Certificate Number Please enter the certificate number for your diamond if you know it as this will help us to locate its details.
Currency Choose the currency in which you would like the price to be calculated.
Calculate price

Tell us something about yourself

First Name/Surname
Mobile phone number
Home phone number
Address line 1

How did you hear about us?

I agree with the Ts@Cs

Security code:

By clicking the button below you confirm that:

  1. you are over the age of 18.
  2. the item is yours to sell.
  3. the details above are correct.
  4. if you accept the quote you will send the goods to us via Royal Mail Special Delivery only, enclosing a copy of this quote.

Send me a diamond pack

* The price given above is just an indication. The final price will be confirmed upon inspection of your diamond

** The minimum diamond weight that we can accept is 0.01ct. Any diamond pack sent back to us with a diamond weight below 0.10ct will incur a postage charge of £5.95

Print Please print two copies of this form. Keep one copy for your records and put the other in the pack with your diamond.

Sell Diamond

HOW Cash for Diamonds will give initial valuations for all diamonds submitted through our website. Sell diamonds - we provide FREE valuations for diamonds, gold, platinum or silver jewellery and offer excellent prices which are market leading.

How to sell a diamond …

Sell diamonds to HOW Cash for Diamonds in the knowledge that this is the best place to sell your diamonds. We are a diamond ring buyer specialist so if you are looking for the best place to sell a diamond ring for instant cash, then HOW Cash for Diamonds can advise you and guide you through the sale process.

Sell diamonds : use our diamond price calculator.

Our customers ask 'How much can I get for my diamond ring?' or 'How to sell a diamond or jewellery for the most money?' or 'Where can I get the best price for my diamond ring or diamond jewellery?'. HOW Cash for Diamonds prices are market leading and our initial evaluations are as accurate as possible.

We buy diamonds of any size, shape or grade, even broken or in poor condition. You can sell diamond rings from the most expensive designs to the smallest diamond jewellery item.

How much can I get for my diamond?

Obviously this is the single most important question when you are considering selling a piece of diamond jewellery. The value of a diamond is primarily determined by its 4C's:

CARAT: how much does the diamond weigh?
COLOUR: does the diamond look yellow?
CLARITY: can you see any 'stuff' in the diamond?
CUT: how well does a diamond reflect light?

Once these four factors are known, we can determine how much your diamond is worth. To make this process as quick as possible we have come up with the Sell Diamond Price Calculator that will allow us to quickly place a value on your diamond.

Sell diamonds for cash

Cash For Diamonds

Sell diamonds for cash: how it works.

We will buy any diamonds, from £50 to £100,000, and settle the transaction direct into your account the same day. We pride ourselves by inviting any of our customers to our premises from 10am - 4pm Monday to Friday, except bank holidays. We will evaluate the diamond in front of you, in our diamond office, and are able to pay for your diamond, straight into your bank account via BACS transfer whilst you wait.

Alternatively, cash can be organised on request (minus a small handling charge). 

Selling Diamonds
If you are unable to visit our premises, we have probably the World's First Online Diamond Evaluator. Simply enter all the details about your diamond, and once our Diamond Calculator has evaluated a price for your diamond, keep one copy for yourself, and put a copy of this with the goods that you are sending to us by Royal Mail Insured Delivery.

If you live outside the UK, read our FAQs

To calculate the price of each individual diamond all you have to do is –

1. Enter the weight

2. The shape 

3. The Diamond colour

4. The Diamond clarity and

5. State which certificate, if you know it

Then just press 'Calculate Price', and you will get an instant guideline to what we will be able to pay you. The price will be confirmed once you post the goods to us by Insured Special Delivery (Special Delivery maximum insurance £2,500)

With Royal Mail's online tracking system, you will be able to track your parcel at any time. In the last 4 years, we probably had delivered by Royal Mail nearly 20,000 parcels, and one has never gone missing!! 

Alternatively, if you wish to apply for a diamond pack, please apply online, and we will send you a Special Delivery Diamond pack (insured up to £500). Although if you send us the goods yourself, it speeds up the process, probably by 3 days.

If you have Diamond Certificates from any of the below Diamond Certifiers, please send them with your diamond(s) to us.

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  sell diamonds, sell diamond, selling diamonds, sell diamonds cash

If you are unhappy with our final offer, we will gladly post back your goods special delivery to you free of charge.
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Weekly diamond report

Read the latest news from the diamond industry.

What our customers say

Hi, My name is Dave and I was just looking at your website and thought perhaps I would message you on your contact form to see if you need help. I really liked your website but noticed you weren't getting a lot of traffic to your site and your Alexa ranking wasn't as strong as it could be. I can get 1,000’s of visitors looking at, ready to buy your product, service or signup for your offer. Our advertising network of over 9000 websites provides a low cost and effective online marketing solution that actually works. We can help your business get more online quality traffic by advertising your business on websites that are targeted to your market. The internet is a vast entity and kick starting your online business doesn’t have to take a ridiculous amount of cash. We’ll send real people to see your web site starting almost immediately! In fact, I can get 10,000 highly targeted visitors to your website for as little as $29 just so you can test out our service. I have a short video here that explains how everything works Best Regards, Dave
Ms Dave King, Toffen
Hi, My name is Randy and I was looking at a few different sites online and came across your site I must say - your website is very impressive. I found your website on the first page of the Search Engine. Have you noticed that 70 percent of visitors who leave your website will never return? In most cases, this means that 95 percent to 98 percent of your marketing efforts are going to waste, not to mention that you are losing more money in customer acquisition costs than you need to. As a business person, the time and money you put into your marketing efforts is extremely valuable. So why let it go to waste? Our users have seen staggering improvements in conversions with insane growths of 150 percent going upwards of 785 percent. Are you ready to unlock the highest conversion revenue from each of your website visitors? TalkWithLead is a widget which captures a website visitor’s Name, Email address and Phone Number and then calls you immediately, so that you can talk to the Lead exactly when they are live on your website — while they're hot! Try the TalkWithLead Live Demo now to see exactly how it works. Visit: When targeting leads, speed is essential - there is a 100x decrease in Leads when a Lead is contacted within 30 minutes vs being contacted within 5 minutes. If you would like to talk to me about this service, please give me a call. We do offer a 30 days free trial. Thanks and Best Regards, Randy
Ms Randy, New York
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Sherri, Schnellendorf
eventually discovered something which works well with my KIDNEY DISEASE 5 various home made remedies to revere KIDNEY DISEASE
Chester, Montford
Excellent from start to finish. The funds were in my bank account within two hours of receiving the valuation. Very highly recommended!
Mr A. Brown, Durham
your diamond valuation link is broken
Mr calum macdonald, aberdeen
I would strongly advise anyone who wishes to sell diamond jewellery to use this company..I was given a very efficient service and dealt with in an extremely fair and friendly manner. I will have no hesitation using them again. Many thanks.
Angela, Redcar
Excellent, efficient service. Staff were very polite and helpful.. Sent my diamonds last week and just woke up to my cheque in the post =) Prices are great also (I worked in a jewellers for 3 years) so instead of having €€ lying around in a jewellery box, get on it and get a price! Nothing to lose
Ms Louise C, Dublin, Ireland
Thank you for your very prompt and professional service. I sent my diamond by post on Wednesday and funds were in my account by Friday morning. Jonathan was helpful and reassuring. I would definitely recommend HCFD.
Mr Raymond Hughes, Inverness
Thank you for your quick response for my diamond valuation
Ms D B
Very polite staff, excellent service. Many thanks
dwingrave, Brighton
I couldn’t believe the care and attention you took in valuing my diamond. I was very impressed and your price was nearly double to everyone else.
Mr P Norman, Enfield
I sent you my platinum solitaire ring last night, and the money is already in my account. Brilliant service! Thank you
Mrs D Elton, Northampton
I was amazed to find in Finchley, North London a proper diamond buying business, all open, no secrets, total transparency and top price. Thank you Jonathan.
Mrs D Selton, Ware
the diamond ring I was left by my great aunt has paid for a whole new kitchen. Thank you Tom and Jonathan for your help and excellent price.
Mrs Norris, Bridlington
Without a doubt you guys know your business. Thank you for your time and knowledge and great price on my ex wife’s diamond ring.
Mr P Kellard, Wolverhampton
Absolutely fantastic service, would definately use this Company again
Ms Hetherington, Newcastle
Absolutely fabulous well pleased with offer staff are a pleasure to talk to.Second package is on the way thank you very much.
Ms janet mcbride, newtownards
Jonathan and his company were a total delight to deal with. Fast response to my query, prompt honest and great evaluation of my item. Money received same day as promised, totally recommend
Ms Teresa
Excellent, friendly service. No hesitation in recommending.
Mrs J, Warrington
I came up from Cornwall with my late mother’s single stone diamond ring – Brilliant Service … Thanks
Mrs D Chesney, Cornwall
Sold my pear shaped diamond, was very pleased with the offer and the service was excellent.
Mrs J S, London
The service was fantastic. very polite and everything was sorted out in a matter of days would definitely recommend and use again . Thankyou Karen
Mrs karen mcmillan, lancashire
I needed money, I drove from Preston to Jonathan & Tom with my 3.0ct round diamond. Was very pleased with the offer and the money was in my account same day.
Mrs P N H
I was left a in a Will a very large diamond, I went to visit Jonathan, in his office. He very carefully graded my diamond and offered more than a fair price,And a cup of tea !!!! Thanks. I can only recommend you to my friends and family.
Mr N T
Excellent Professional services, super quick payment, made the process simple highly recommend, very honest grading of diamonds!!
Mr m, highlands, scotland
In the business of diamonds The Only Person I can trust is Jonathan Williams. He is realistic & a wonderful person. I sent him 3.5 carat diamond. I got good offers from him & when I didn't agree to the offer. I got my diamond back within next day. Trusted in the field of business
Mrs Nusaiba, London
Great service from start to finish. Cash in my bank the same day. Thank you Julie
Ms Julie Orain, Neston Cheshire
Absolutely cannot fault this service! Jonathan was friendly and efficient. Posted my diamond and money was in my account the following afternoon. Would definitely recommend!
Mrs Briggs, Stockport
Very friendly and efficient. Sent out the diamond pack very quickly and I had a follow up call to ensure I received it and to explain what I had to do. After I sent my ring off it was only a couple of days before the quote was made which I was very happy with. Would definitely use them again. Thank you
Ms Hannah, Beds
I sold my diamond solitaire stud earrings, great service, and great price.
Mrs J P
Great price for my princess cut diamond ring and money was in my account same day. Thank you
Mr P
Very polite service, you made the sale of my solitaire ring quite painless.
Mrs J Hunt
Fantastic service efficient professional and recieved more than expected will Definately use again thankyou
Ms Mema, Lancashire
I found the service offered to be excellent, the staff - especially Jonathon- are extreme pleasant to deal and a pleasure to deal with. Very happy with the service and hope to have more dealings in the future - many thanks!
Ms Lisa B, Preston
Excellent service would reccomend
Mrs Susan, whitehaven
Just received the payment. Thanks for such a smooth process. I will be sure to recommend you to everyone I know. Thanks again.
Ross Clark, Perth
My fiancée and I finished our relationship a couple of months ago. By finding your website; and have sold you my 1.20 G/VS1 GIA diamond ring, I don’t feel so heartbroken now.
AR, Southampton
I had a diamond Tennis bracelet which I never wore. Thank you for such a great price.
DP, Harrow
You gave me double to what I had been offered for my 5.32 Emerald Cut diamond - Thank you so much.
RB, Liverpool
I found your site on Google, I think your service is unique; I was delighted with the price I got for my pear shaped diamond. I posted it by Royal Mail Special Delivery on Tuesday, and the money was in my account by Wednesday 12pm – under 24 hours – very impressed.
MF, Newbury
I was left a 2.30ct round diamond from an old aunt in her will, and I am absolutely gobsmacked at what you paid me when I came to your office, a big thank you Jonathan, your service was courteous, safe and friendly and very professional.
JR, Enfield
I think your site is amazing, I have used How Cash For Gold for 3 years, and saw your new site last week for selling diamonds. Your calculator is unique, and you gave me the prices quoted. I will definitely recommend you to my friends. I got £1500 for a diamond I had in the draw from my first husband, I will now spend that money with my new husband!!!
TG, Middlesbrough
Great company with great service. I found your site through google and within three days of finding the site i have got the the best price for my diamond and the cash paid into my account. Will definitely use your company again and will recommend you to everyone.
Mr s, armagh
Absolutely fantastic service, I would strongly recommend this service to anyone wanting to sell their Diamonds. The whole process was seamless from start to finish and I received my money the same day as I accepted the estimate, Thank you
Ms Colwell, Sunderland
Fantastic service! Sent my diamonds off in the post and received a phone call a couple of days later giving me a quote. Received the cash in my account the next day! A pleasure to deal with. Thanks again.
Mrs Angela Young, Farnborough, Hampshire
I used the calculator to get an estimate for my diamond ring (diamond price + platinum price). Sent my ring down on day 1, Jonathan called on day 2 (very polite and appropriately business-like), money in account day 3. Couldn't fault service. Found this company to be very trustworthy.
CL, Scotland
I would most definitely recommend this company if you would like a quick and easy sale. Cannot fault the service I received. Thank you.
Mrs Robertson, Scotland
I would most definitely recommend this company if you would like a quick and easy sale. Cannot fault the service I received. Thank you.
Mrs Robertson, Scotland
I enjoyed the visit and sincerely would give you highest recommendations to my friends.
G Foulkes, Essex
Thanks for a very prompt and hassle free service. Rapid one day turnaround from posting my item to receiving the cash in my bank account. Highly recommended!
Mr RE, London
Absolute fantastic service! Couldn't have asked for a more prompt response and the money was in my account the next day after the offer was made. Will definitely deal again and recommend to others, thank you.
Mrs D Crosby, York


If you’d like to leave us feedback, fill in a feedback form

HoWCashForDiamonds is a trading style of Jewellery Cave Ltd.

Registered in England No. 06616633.

Diamond buying Office :: Howcashfordiamonds, 48b Hendon Lane, Finchley, London N3 1TT

©2018 Jewellery Cave Ltd.

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Terms and Conditions

  • is a company within Jewellery Cave Ltd and enables us to trade under the various brands we promote; Jewellery Cave Ltd is registered in England & Wales 6616633, whose registered address is 13 Station Road, Finchley, London N3 2SB

  • These Terms and Conditions shall be governed by the Laws of England and Wales and are the basis for the establishment of relations between "you" and "us".

  • Our provisional offer is based on your original description, on the assumption that the description provided is completely accurate, we value the goods in faith as falls within prevailing market rates and according to accepted industry standards.

  • Our provisional offer is not contractually binding.

  • Upon receiving your goods, it will be compared to your original online description to confirm they match.

  • By sending us your property you agree to us testing the diamonds.

  • If we find a variation in your original online description which affects the valuation of the offer, we reserve the right to adjust the offer either upwards or downwards, depending on our valuation compared with your original description.

  • Conditional offers are subject to contract, and are not legally binding until after we have physically inspected the items, confirmed to you verbally or by email, phone or written letter.

  • We will need to identify you, we only need copies NO ORIGINALS TO BE SENT, you will need to provide 1 proof of photo i.d. For example (Passport, Photo Driving Licence, or National Id Card). Also 1 proof of home address dated within the last 3 months for example. Please post copies in your Special Delivery Packet or you can scan and email them to, or fax the documents to fax number 0208 369 5900.

  • How Cash for Diamonds can provide basic packaging for your items which comprise an insert envelope and Royal Mail Special Delivery tamper proof bag. It is your responsibility to ensure that your items are securely and appropriately packaged, including the use of additional and/or item specific packaging. How Cash for Diamonds cannot be held responsible for damage to items sent in inappropriate packaging.

  • Our nominee to act as your shipping agent for your property is Royal Mail. The Royal Mail Special Delivery Service provides insurance cover for loss or damage to Your Property in transit, up to a market replacement value of £2,500.00. If you think the market replacement value of your goods is more than £2,500.00, it is your sole responsibility to take out additional insurance for that part of the market replacement value which exceeds £2,500.00. If you choose to despatch goods of a replacement value exceeding £2,500.00 via the Royal Mail Special Delivery Service without arranging any additional insurance cover, you agree that you are doing so at your own risk, and that you will have no claim on us and/or the Royal mail for any amount exceeding £2,500.00 of the replacement value of any goods lost, damaged or devalued in any way in the course of The Royal Mail Special Delivery Service. See special delivery page

  • You agree that we (How Cash For Diamonds) are not liable in any way if Royal Mail refuses any insurance claims in relation to Your Property.

  • While we will provide you with information that we have to help you in any dispute or claim that you may have with your shipping agent, we cannot be held liable for any failure in the shipping agents performance or of its obligations to you. Under the Data Protection act we will not have access to your claim against the shipping agent and we cannot act on your behalf in any part of the claim or dispute with the shipping agent.

  • It is your responsibility to obtain and retain the receipt for proof of postage and unique tracking number from the Post Office when sending your items to us, see / special delivery page.
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