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We’ve teamed up with Klarna to provide flexible payment options, allowing you to shop the way you want. With Klarna, you can split your payment into 3 instalments or choose to pay later, making your shopping experience smoother and more convenient. Your order total must be between £100 and £499 to qualify.
May 26, 2026 | by David
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It is law within the UK that every item of precious metal sold such as Platinum, Gold, Silver is stamped labelling the item with the type of metal it is. Platinum pieces which weigh less than 0.5 grams, 18ct Gold and Palladium pieces weighing less than 1.0 gram and Silver pieces weighing less than 7.78 grams are except from hallmark.
At Diamonds Factory all our products are hallmarked as per UK hallmarking law from London Assay Office (The GoldSmith Company)
The Goldsmiths' Company Assay Office is the oldest assay office in the United Kingdom. It has provided hallmarking services since The Goldsmiths' Company was founded in the 1300s. The company received its royal charter in 1327 and ranks 5th in order of precedence of the 12 Great Livery Companies of the City of London.
Hallmarking dates back to the 1300s when Edward I of England passed a law requiring any item made of silver, which was offered for sale, to be at least of equal quality as that of the coin of the realm (silver currency). The wardens of The Goldsmiths' Company were tasked with visiting workshops in the City of London to assay (test) silver articles. If these articles were found to be below standard they were originally destroyed and the metal forfeited to the King. If they passed, each article received the King's mark of authentication - the mark of a leopard's head. By 1478, there were several hundred workshops and merchants manufacturing silver articles in the City of London. It was not possible for the wardens to visit them all so the merchants were ordered to bring their items to Goldsmiths' Hall for testing and marking and a permanent Assay Office was established in the building. This is the origin of the term hallmark - struck with the King's mark at Goldsmiths' Hall.
In 1544 the Goldsmith's Company adopted the King's mark as their town mark and the mark of the leopard's head is now internationally recognised as the mark of this assay office.
The Goldsmiths's Company Assay Office is still based at Goldsmiths's Hall and remains the oldest company in Britain to be continually trading from the same site. However, it also has two satellite offices; at Greville Street in Hatton Garden in the heart of the London jewellery quarter and within a high security complex near London's Heathrow airport. It now has a new off-site facility within the Dalston-based jewellery manufacturer, Allied Gold. This is the first time in the Assay Office's 700 year history that it has opened permanent hallmarking services on a customer's premises.
In addition to hallmarking, the office has now expanded its range of services to support the jewellery trade and enforcement authorities. It offers a variety of specialist analytical services including nickel, lead & cadmium testing, antique silver dating, non-destructive compositional analysis, plating thickness measurement and a melt and assay service for scrap precious metal carried out in their fully independent on-site laboratory. Other services offered are a jewellery valuation service, laser marking, trading standards assistance, high quality photography and a comprehensive range of training and educational seminars, lectures and specialist events.
Gold Is Evolving — And So Are Buying Decisions
Gold has always been at the heart of fine jewellery. It carries meaning, sentiment, and a sense of permanence. But in today’s market, the way people are choosing gold is shifting — and that’s not a bad thing.
With global gold prices remaining high and customers feeling more informed than ever, conversations are becoming more practical. It’s no longer just about “18ct is best.” It’s about what actually works for the person who’s going to be wearing it.
Round Diamond Engagement Ring
From £734
4 Prong Setting Plain Engagement Ring
From £343
White Gold Round Diamond Stud Earrings
From £48
Prong Setting Diamond Solitaire Pendant
From £76
White Gold Round Diamond Stud Earrings
From £48
18ct vs 14ct — What’s the Real Difference?
18ct gold has long been seen as the premium standard. With 75% pure gold content, it offers a deep rich tone — particularly in yellow gold — and a traditional sense of luxury.
But 14ct gold is fast becoming a strong option in its own right.
At 58.5% pure gold, 14ct is slightly more durable thanks to its hybrid alloy mix. For engagement rings, wedding bands and everyday pieces, that added strength really matters. Most customers aren’t buying jewellery to just sit in a box — they’re wearing it every day, whether that be at work, at the gym, on holiday or just living life in it.
That’s where 14ct gold starts to make a lot of sense.
What We’re Seeing at Diamonds Factory
Here at Diamonds Factory, we’ve seen a clear shift across the UK and Ireland particularly, with customers asking more questions, as they want to understand what they’re buying and why.
Interestingly, many are completely open to 14ct once they understand the benefits.
It allows them to:
And visually? In white and rose gold especially, the difference between 14ct and 18ct is minimal to the untrained eye.
It’s less about “downgrading” and more about making a smart, balanced decision.
Smarter Gold Buying Tips
When it comes to making gold purchasing decisions — a few simple questions go a long way:
There’s no one-size-fits-all answer anymore.
Conclusion: A More Modern Mindset
Gold will always represent luxury. That hasn’t changed. What has changed is how we define value.
Choosing 14ct isn’t about cutting corners. There’s a reason why it’s now a trending metal in 2026, and it’s all about understanding the full picture — lifestyle, longevity, design and investment.
At Diamonds Factory, that’s what we focus on. Clear advice. Honest conversations. Beautiful pieces that are designed to be worn and enjoyed at a fantastic price, because modern luxury isn’t about tradition alone — it’s about what works best for you.