Borrow against Diamonds

Release funds against your diamonds - quickly and at the lowest interest rates.

Your diamond could be the route to a short-term, low-interest, hassle-free loan. Unbolted will lend up to 70% of your diamond's value.

Valuing your diamond

For an accurate valuation we'll first need information regarding the 'Four C’s':

  • Cut: Round brilliant, princess or emerald cut? Is your diamond cut to ideal proportions and do you have certificates?
  • Colour: Do you have that rare colourless diamond or the intense blue of Hope Diamond?
  • Clarity: Are your diamonds flawless or are they slightly included but eye-clean?
  • Carat: How big is your diamond?

We also look for certificates from institutes such as the GIA and AnchorCert. If these aren't available, our specialists can grade your diamond. We use Rappaport information combined with auction house knowledge. This helps us provide the maximum loan amount.

Diamond set in jewellery? No problem. If we can, we'll grade it in its mount. However, to properly grade larger diamonds we have these un-mounted by the industry's finest jewellers.

Ready to get started?
Submit an application today

Valuing a Diamond

Valuing Your Diamonds

We know how precious your diamonds are. Since small differences unseen by the naked eye can make such a dramatic difference, Unbolted only uses well known experts to determine the secondary market value.

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Specialists in Diamonds

We work with specialist diamond retailers at Hatton Gardden for obtaining a valuation on your items.

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Storage and Shipping of your Diamonds

We understand the value of your diamonds and offer a fully insured process for you to send us your diamonds. Or you may arrange to take them personally to our office in the city or one of our partner's locations.


How to buy a diamond

Diamonds are undoubtedly the most iconic gem stone of the past few hundred years age, but financially they can be either a fantastic investment, or a costly purchase.

The brilliant stones can be found in a range of settings, qualities and sizes. However, contrary to popular belief, just because a …

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The art of valuing diamonds

Diamonds are included in the asset categories we use as collateral for our low-cost secured asset loans at peer-to-peer lender Unbolted. If you’re contemplating borrowing from Unbolted against a diamond you possess, here’s how we determine its value. 

The Gemmological Institute of America (GIA) and the UK’s AnchorCert (both widely …

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Shine on Coloured Diamond

Move over white – diamonds in rainbow hues are now on everyone’s wish list which means they are increasingly attractive!  We find out why….

The Hope Diamond is probably the most famous coloured diamond in the world. The grey-blue stone (and its infamous curse) is sequestered inside the Smithsonian Museum …

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The Increasing Popularity of Coloured Diamonds

According to The Wealth Report, there has been a staggering 167% increase since 2005 in the value of fancy coloured diamonds, including pink, yellow and especially blue diamonds. Recent auction results are certainly reflective of this. Bonhams’ Fine Jewellery Auction of 2013 set the record at the time for the …

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