Investing
Hatton Gardens 5 top tips for investing in Diamonds
Published by linker 5
Posted on September 24, 2020
5 min readLast updated: January 21, 2026
Global Banking & Finance Review®
Company
Published by linker 5
Posted on September 24, 2020
5 min readLast updated: January 21, 2026
By Ben Stinson, Head of eCommerce at Diamonds Factory
Investing in diamonds can be extremely rewarding, but only if you know what to look for. For investors who lack experience, finding your diamond in the rough can be quite daunting.
For even the most beginner of diamond investors, the essentials are fairly obvious. For instance, you need to ask yourself will the diamond hold its value over time? What’s the overall condition of the stone and the jewellery? Is there history behind the item in question?
Although common sense plays a big part in investing, people often need insider tips and tricks to go from beginner to expert. Tony French, the in-house Diamond Consultant, at Diamonds Factory shares his professional knowledge on the 5 most important things to look for when investing in diamonds.
1: Using cut, weight and colour to determine value
Firstly, consider the shape, colour, and weight of your diamond, as this can play a pivotal role in guaranteeing growth in the value of your item. Granted, investing trends change with time, but a round cut of your diamond will almost always be the most sought after. The cut of your diamond is incredibly important, as it can influence the sparkle and therefore, the overall value. It’s a similar story for the intensity of some colours, such as Pink, Red, Blue, Green etc. Concerning weight, the heavier (bigger) stones will generally increase in value by a bigger percentage. Collectively these factors also contribute to the supply and demand aspect, which will determine their high price, and will ensure your item is re-sellable.
2: Provenance
Looking for significant value? Well, aim to own jewellery or diamonds that come from an important public figure. If you’re lucky enough to own a piece that has significant history, or was owned by a celebrity or person of interest, it’s an absolute must to have concrete evidence of this. Immediately, this proof will increase an item’s overall value, and there’s a good chance the stardom of your item might drum up interest amongst diehard fans, increasing the value even further…
Equally, it’s possible to proactively bring provenance to unique diamonds of yours. For instance, you can offer to loan bespoke, or unusual pieces for film, theatre, or TV performances – then it can be advertised as worn by xyz.
3: Find the source
Ben Stinson
Establishing your diamond’s source is one of the most important things you can do when investing in diamonds. If you’re starting out, try to purchase diamonds that have NOT been owned by too many people, as the overall value of the diamond will reflect multiple ownership. Alternatively, I’d always recommend buying from suppliers like ourselves or other suppliers and retailers, who buy directly from the people who have had them certified.
Primarily, this will allow you to have a greater degree of transparency, which is crucial when buying such a valuable item. Next, you should immediately see an increase in value of your diamonds, as identifying a source will allow traceability and therefore, market context.
4: Certification
Linked closely with my previous point, is the requirement to ensure that your diamonds are certified by a credible lab, and you have the evidence to prove so (a written document with specific grading details about your diamonds) – this will remove any doubts of impropriety.
It’s essential to remember that not all labs are the same, and many labs are better than others. Both the AGS (American Gem Society) and GIA (Gemological Institute of America) have great reputations and are world renowned. I’d recommend doing your own research into the labs, and when you’ve found the pieces that you’d like to invest in, then make an informed decision based upon your findings. Ultimately, proving certification will make your stones easier to insure, and deep down, you can have peace of mind knowing you have got what you have paid for.
Don’t forget to keep this paperwork in a safe location as well – you’d be surprised how many people we’ve met who have lost, or forget where they’ve placed it.
5: Patience is a virtue…
If the market is strong, it might be tempting to look for an immediate sale once you’ve purchased a high value item. However, I suggest holding onto your diamonds for some time before even thinking about selling. More often than not, an item is more likely to increase in value over a few years than a few days – try and wait a little longer!
Equally, I would encourage having your diamonds, or jewellery professionally valued regularly. If you don’t have the knowledge to make a rough judgement on how much your pieces are worth, a consultant or expert can provide both a valuation, and contextualise that amount in the wider market. From there, you should be empowered with the knowledge to decide whether to keep or sell.
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