London Diamond Specialists
Buying & Selling
Diamonds in London
NATURAL DIAMONDS · 1.20+ CARATS
Free valuations for certified and uncertified natural diamonds from our London diamond specialists.
GIA-certified graders 135 client reviews
Request a Free ValuationWHY SELL TO LEISER?
Diamond wholesalers. Expert grading. Competitive offers.
Our expertise in precious gemstones market valuations allows us to offer our clients extremely competitive prices when they both buy or sell diamonds. Our large turnover and many business contacts allows us to find the proper buyer for you at the right price. For this reason, you can sell your diamonds with confidence that you will receive the best possible payout.
“Impeccable service which ensured I got a really good price - seamless payment straight into my bank account.” — Thai H.
THE SIMPLE NEXT STEPS
Free appraisal. Clear offer. Your choice.
- 01Tell us about your diamond
- 02Expert appraisal
- 03You decide what to do next
Asking for an offer is not agreeing to sell. You choose what happens next.
Welcome to Leiser & Co
Leiser & Co are London diamond specialists for buying and selling diamonds, plus bespoke engagement ring work. We offer free appraisals for both certified and uncertified diamond. Request a quote to get an initial valuation.
Request a Free Valuation
We will gladly offer free appraisals for any of your enquiries.
Please note that we only purchase natural diamonds that are above 1.20 carats in size
START YOUR ENQUIRY
Free Diamond Valuation
Photo and certificate optional. You can get in touch without either.
Name and email needed. Phone optional. Not sure of the carat weight? Tell us what you know. We purchase natural diamonds from 1.20 carats.
Our Expertise
Experts in Both Uncertified & Certified Diamonds
We specialize in certified diamonds by the most trusted diamond grading companies in the world. Some of them for example include: GIA, HRD and IGI.
We are also GIA-certified graders with three generations of experience passed along in the field, but we both buy and sell diamonds that do not have certificates as well. Should you desire, we also deal with other certificate types on request as well.
Bespoke Jewellery
Specialised in Custom Work & Bespoke Engagement Rings
We work with casters, goldsmiths and designers directly, and are able to create any custom model our clients desire. If you would like to get a quote for a price on a custom item of jewellery, please don't hesitate to contact us, whether it is men's rings, engagement rings, necklaces, pendants, bracelets or anything else we are sure to be able to create your custom piece with a finish of the highest perfection.
