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We love diamonds. More precisely, good diamonds. We care about the best diamonds in London. We take great pride in the stones we source, these aren't High Street, or Online standard. 

Round Brilliant 0.51ct
£ 1,030 
Great colour and superb cutting, 5.11mm - 5.14mm.
Round Brilliant 0.53ct
£ 1,700 
Good spread and great looking, 5.32mm x 5.34mm.
Round Brilliant 0.60ct
£ 2,290 
Super sparkle increases stone presence, 5.42mm - 5.44mm.
Round Brilliant 0.70ct
£ 2,630 
Perfect brilliance, 5.72mm - 5.74mm.
Round Brilliant 0.77ct
£ 2,800 
Stand out diamond, 5.91mm - 5.93mm.

About Our Diamonds

Ruth Looking through a loupe at a diamond

Diamonds have mesmerised for millennia. They have a sparkle unlike any other crystal, and each stone is a miracle of time, place and chance. No two natural stones are ever identical, they all have their own characteristics to be enhanced or played down by cutting and polishing. Despite there being over 16,000 different configurations of stone quality, we have two questions; how pretty is the stone, and is it worth the asking price? Every diamond we sell, has been inspected at least three times by separate individuals, and offered against each client brief and budget.

A diamond in a measurement device

Heirloom diamonds generally come with a GIA appraisal over 0.40cts. We may offer stones from other evaluation bodies (like IGI or HRD) if we like the look of them. It is easy for a stone to come with a nice appraisal, unfortunately it may not tell the full story of the diamond appearance any better than other appraisals which rule the stone down as being lower quality. Our diamond experts have over 60 years’ experience, we trust them to verify that each stone has a big glittering personality. This is where our value lies. After all, everyone wants the best diamond they can afford, and we ensure they genuinely are exactly that.

Want to learn more about diamonds before you buy?

The Diamond Society

We have been looking for a nice way to thank our clients and friends when they introduce us to new clients who become friends. So began the Diamond Society. For every successful referral (i.e. one which results in new business for us) we gift the referrer a little diamond. These can be used to create pieces of jewellery, or retained, and used for a future project.

There are no strings to this, only that the introduction leads to a genuine sale. At this point (generally when jewellery is delivered) the diamond will be presented or posted to the recipient, or held by Heirloom until the recipient has a satisfactory collection to make something with!

If you know of somebody, who would benefit from one Heirloom's expert services, feel free to introduce them to us, and start collecting your own diamonds for your next jewellery creation.

High value security checks

We may subject you to a few extra security checks. Unless you are engaged in criminal activity you have nothing to worry about.

Frequently Asked

Are your diamonds Fair Trade?
Can I buy a traceable diamond from yourselves?
Why don’t you just sell diamonds from lists?
Why are you saying I can’t trust an online certificate for a diamond?
I would like to pay less than list price and in cash, can you do this?
Do you ship stones overseas?
What happens if I am not happy with my diamond?
Why do I have to pay an admin fee if I return my stone?
I want my partner involved in the ring design, but I want to choose the diamond. How can I propose with this stone?
Why Should I Buy From You When I've Seen Cheaper Stones Elsewhere?
When Do You Charge A £300 Retainer?
Do You Sell Lab Grown Diamonds?

Still haven’t found what you’re looking for?

If you are looking for something not covered by our services just get in touch. We’ll be able to answer your question right away and our first conversation won't cost you anything.