After years of helping people to choose lab grown diamond engagement rings, we’ve noticed something interesting. Most customers arrive having spent hours researching diamonds, but very few have thought about how to choose the diamond jewellers in London to guide them through the process.
That matters more than you might think; a beautiful ring is only part of the experience. The advice that you receive and the confidence that you leave with depend entirely on the person sitting across the table from you. A good jeweller won’t rush you towards a decision or tell you what you should buy. They’ll answer every question you have honestly and help you understand why one diamond or setting may suit you better than another.
The questions below are the ones that we believe every buyer should ask when looking for a diamond engagement ring. They’ll quickly tell you whether you’ve found a jeweller in London you can genuinely trust.
10 Questions Every Buyer Should Ask Before Choosing Diamond Jewellers
A good jeweller should leave you knowing far more than when you walked in. The questions below aren’t designed to catch anyone out. They’re the same conversations that we have with clients every day because they help to explain what’s behind the price tag and, just as importantly, whether you’re buying a lab grown diamond engagement ring from someone who’s genuinely interested in helping you to make the right decision.
1. Are Your Diamonds Independently Certified?
This is always where we’d recommend starting. Every diamond, whether natural or lab grown, should have independent certification from a recognised laboratory such as IGI or GIA. That certificate is your reassurance that the diamond has been graded by an impartial expert rather than the jeweller selling it.
If someone is reluctant to show you the certificate or dismisses it as unimportant, we’d see that as a red flag. A reputable diamond jeweller should be happy to walk through the grading with you and explain exactly what certifies your lab grown diamond engagement ring.
2. Can I Compare Multiple Diamonds Side by Side?
We’ve lost count of the number of customers who’ve changed their minds after seeing two diamonds next to each other. On paper, they can appear almost identical but in-person, the differences in sparkle and overall appearance are so much easier to appreciate.
Any jeweller who encourages comparisons is usually confident in the quality of their diamonds. You should never feel as though you’re expected to choose the first stone that’s placed in front of you.
3. Where Are Your Rings Made?
This question tells you more than many people realise. Some jewellers have close relationships with experienced workshops or make jewellery in-house, whilst others simply order finished rings from large manufacturers.
Neither approach is automatically right or wrong, but it’s worth understanding who’s making your ring and how much involvement the jeweller has in the process. If you’re investing in a bespoke lab grown diamond engagement ring, knowing the craftsmanship behind it is every bit as important as knowing the quality of the diamond itself.
4. Can You Explain Why This Diamond Costs More Than Another?
This is one of our favourite questions because it usually leads to the most interesting conversation. Clients often assume they’re paying more simply because a diamond is bigger, but that’s only part of the story.
We’ve seen two diamonds with almost identical certificates look completely different once they’re placed side by side. Cut quality, proportions and the way that a diamond handles light can all influence its beauty, and those details aren’t always obvious at first glance. A jeweller should be able to explain why one stone commands a higher price than another without hiding behind technical jargon. If they can’t, it’s fair to ask a few more questions until you feel comfortable with the price point.
5. Can I Customise the Ring?
You might think that bespoke jewellery means starting with a blank sheet of paper but that’s rarely the case. Sometimes the smallest change, whether that’s choosing a different setting, changing the precious metal or selecting a different diamond, is enough to create a ring that feels completely personal.
If you’re considering a lab grown diamond engagement ring, customisation can also help you make the most of your budget. Rather than settling for a standard design, you can prioritise the features that matter most to you and create something that’s genuinely your own.
6. What Happens If My Ring Needs Adjustments Later?
An engagement ring is designed to be worn every day, so it’s perfectly normal for it to need a little attention over the years. Rings sometimes need resizing and a professional clean can make even a well-loved diamond look as bright as the day it was chosen.
That’s why it’s worth asking about aftercare before you buy. A jeweller who expects to look after your ring long after you’ve left the showroom is usually thinking about building a lasting relationship rather than simply completing a sale.
7. Do You Offer Personal Consultations?
Buying an engagement ring isn’t something that you do every day, so there’s no reason why you should feel rushed through the process. In fact, some of the best appointments we’ve had have been the ones where customers simply wanted to sit down, look at a few different lab grown diamonds and ask plenty of questions.
A consultation should feel like a conversation, not a sales pitch. You should leave with a better understanding of your options, even if you decide not to buy that day. If a jeweller is happy to spend time educating you without any pressure, it’s usually a very good sign.
8. Can You Explain the Difference Between Lab Grown and Natural Diamonds?
There’s still a lot of confusion around lab grown diamonds, which is why this question is so important. A knowledgeable jeweller shouldn’t push you towards one option or the other. Instead, they should explain the differences clearly and let you decide what best suits your priorities.
If every answer seems designed to steer you in a particular direction, ask yourself why. The right jeweller will be confident enough to present both options honestly, explaining the advantages of each without making you feel you’ve chosen the ‘wrong’ one.
9. What Guarantees or Warranties Do You Offer?
It’s easy to focus on the excitement of choosing a ring and forget about what happens afterwards. Before you buy, ask what support is available once you leave the showroom. Do they offer any sort of guarantee or warranty on lab grown diamond engagement rings? What is the aftercare process?
These details might not seem exciting, but they tell you a lot about how a jeweller looks after their customers. The best relationships don’t end when the ring goes into the box.
10. What Makes Your Jewellery Different?
This is probably the question that we’d encourage every customer to ask because there isn’t a single right answer. A jeweller who’s passionate about their craft will usually enjoy talking about what makes their work different, whether that’s sourcing exceptional diamonds or creating bespoke pieces from scratch.
Listen carefully to the response. If the conversation centres around quality, craftsmanship and helping customers find the right ring, you’re probably in good hands. If it comes back to discounts and special offers, that can tell you just as much.
Why Buyers Choose Hatton Garden Diamond As Your Diamon Jewellers In London
We’re incredibly proud that our family-run business has been at the heart of London’s jewellery district since 1982. What began with our founder, Stephen Perry, as an apprentice goldsmith has grown into one of Hatton Garden’s most respected family businesses, with more than forty years of craftsmanship and two generations of the Perry family now working side by side.
For us, every engagement ring represents the beginning of someone else’s story. After more than four decades serving couples from across the UK and beyond, we’re proud that so many families continue to trust us with those moments. If you’re ready to begin your own journey, we’d love to welcome you to our Hatton Garden showroom and show you what that experience feels like.