Looking to sell your diamond?

We’ll be more than happy to offer a great price for your items.

Need to raise Cash?

Bills to pay? Possibly a new kitchen? Home improvements? Broken relationship? How about a well deserved holiday?

Let us make you an offer! Instant offers. Instant payment. We trade from safe and secure premises in a dedicated jewellery suite at 100 Hatton Garden, London.

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Instant offers on certified GIA, HRD & IGI diamonds

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A selection of our bespoke engagement rings


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Special Offer

Special Offer 1

Round Brilliant Diamond.
1.44 carat

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About 4Cs

The founder, Daniel Rosen, is a member of The London Diamond Bourse and World Federation of Diamond Bourses, and has been since 2000. He is a graduate from The Institute for Diamond Studies and has more…

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Sell Diamond & Engagement Rings Online

As a leading precious gemstone merchant, 4Cs Diamonds is able to offer a complete design service focusing primarily on engagement rings, wedding bands and fine jewellery.  Trading from a safe and secure suite at 100 Hatton Garden, we invite clients to visit our office for consultations in a relaxed and comfortable atmosphere.
We also purchase diamonds and jewellery and make on the spot offers.  Payment is immediate and funds are cleared in your account before you leave the office.