Sell my Diamond

sell my diamond


naj valuation


This LONG TERM consignment service can take up to 12 months & costs from just £100 upfront plus an agreed additional commission payable at the point of sale.

If your jewellery is of sufficient quality, style and condition we will endeavour to achieve the best possible second hand retail prices, which means that you could receive more than would be obtained by selling at auction or through the trade. A remounting service is also available to modernise older or less saleable pieces.

Our commission is a fixed percentage of the proceeds, agreed before sale and does not vary regardless of sale price.

The jewellery will be displayed in our showroom and advertised on the website as well as other media channels. All of your jewellery and watches will be fully insured whilst on our premises.



Commission Rates are as follows and are subject to 20% VAT
£0.00 to £1000 48%
£1001 to £2000 45%
£2001 to £3000 40%
£3001 to £4000 35%
£4001 to £5000 30%
£5001 to £6000 25%
£6001 to £7000 22%
£7001 to £8000 20%
£8001 to £9000 19%
£9001 to £10000 18%
£10001 to £20000 15%
£20001 to £30000 14%
£30001 to £40000 13%
£40001 to £50000 12%


  1. The initial upfront fee covers:
    1. A check, clean and polish (additional work to make saleable will be advised and would be chargeable)
    2. An independent NAJ valuers pre-sale report - This is converted to a full NAJ valuation and posted to the private buyer at point of sale
    3. Professional photography
    4. Administration, including the listing on, social media & other online sales channels
    5. Showroom display
  2. All items must be of a saleable standard, any work required would need advance settlement.
  3. Sale price, minimum sale price & commission are set on completion of NAJ report
  4. The agreed commission fee will be deducted from the final sale price and is subject to 20% VAT.
  5. Additional costs incurred for advertising via other on-line sales channels will be deducted from the sale proceeds before commission applied.
  6. All owners jewellery left with CWG for sale will be covered by the company’s jewellery block insurance policy for theft and/or damage.
  7. We cannot guarantee the sale of the owner’s item(s) within the 6-12 months period.
  8. In the event the item does not sell within the 6-12 month period the owner is fully entitled to take back possession of their item. The owner is also entitled to the NAJ Report and professional images taken.
  9. The seller is fully entitled to take back possession of their item before the agreed term but will not be entitled to any refund of upfront costs, the NAJ report or images taken.
  10. Any cash offer made by a private buyer that is less than the minimum sale price will be referred to the owner for their approval before the sale is accepted.


quick sale

This QUICK SALE service takes 1–3 days with no upfront cost.

We will either buy your item outright or negotiate on your behalf by offering the diamond or precious stones to our trade buyers and recycle the gold or other precious metal to give you the best possible price.

There are no upfront costs or obligations for this service.
We will either buy your item outright or just negotiate the best price on your behalf via our trade network.




"I have received excellent customer service from Wharton Goldsmith after having three pieces of jewellery commissioned. My ideas for a ring, earrings and pendant designs were extremely well interpreted. All valuations were received in a timely manner and I would recommend Wharton to friends and colleagues."

Mrs. Karen Lewis


"I was so pleased when Wharton goldsmith said they could replicate my wedding ring from silver to platinum.
Wharton's service was so professional. They are so polite and very patient.

My platinum wedding ring is spectacular and very, very well made. I am so pleased I chose Whartons."

Mr. Manuel Gomez


"I was recommended Wharton Goldsmith through a good friend who has used them multiple times over the years. I would not hesitate to do the same. I designed an engagement ring from scratch with Sam’s help, the service was outstanding from day 1 and the ring was perfect! We then got 2 wedding rings made, again extremely pleased! The entire process was flawless and I couldn’t be happier! I look forward to using them in the future! Highly recommend!"

Mr. Tom Bristow


"Professional and friendly service and outstanding workmanship. You get what you pay for."

Sam Carr


"The staff are very helpful and the jewellery is well crafted. I am very pleased with the service and my jewellery."

Mrs. S Leeming


"Wharton Goldsmith are an excellent family business. I have bought many items from them over the years and had several bespoke pieces made. On every occasion I have been delighted with both the quality of the workmanship and the service I received."



"Excellent. Went in to have my wedding ring checked as diamond was loose. Friendly and helpful, lovely repair and clean...and a new box! A reasonable charge as well.

I completely adore my Christopher Wharton rings, I have an engagement and diamond wedding band. Perfect. Thank you x"



"We have used Wharton three times recently for repairs and resizing of rings. Each time the service has been impeccable and the standard of repair faultless. The shop staff are very patient and very knowledgeable, explaining the pros and cons of different options, and the prices have been reasonable. The workshop staff produce a faultless product, on one occasion meeting a tight time request."

Mr. R Bolt


"I can wholeheartedly recommend Whartons for extra personal customer service, extensive product knowledge and care with a wonderful on-site workshop."

Mrs. Sacha Cole


"It is always a pleasure to deal with Wharton Goldsmith. The staff are very welcoming, always professional and the quality of their work outstanding. I have had jewellery made, purchased jewellery, had rings sized and items valued. On each occasion I have been extremely happy with the service and quality of work received."

Mrs. N Johnstone