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)
Where Hallmarking Began
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.
Today
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.
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It’s officially that time of year again and here at Diamonds Factory we love celebrating love which is why Valentine’s has easily become one of our team's favourite yearly celebrations. Jewellery is the perfect way to show someone exactly how much you care, whether that be with a simple pair of diamond earrings or a big shiny engagement ring to really seal the deal and make Valentine’s Day 2026 one they’ll never forget.
The common misconception is that Valentine’s has to feature all the frills and spills, but we think the best way to spend Valentine’s is to just do whatever you want to do with the person you love the most - try to think about the things and places they love and use that as your starting point. Where to start with gifts we hear you ask, well to make things a little easier for you (or your partner if you want to forward this their way as some friendly inspiration), we’ve compiled a list of all our top jewellery gifts from diamond rings to tennis bracelets, pendant necklaces and so much more.
Gifts for the Earring Lover
The easiest way to find the perfect jewellery gift is to think about what type of jewellery your partner already loves, and if they’re always wearing earrings then why not add another pair to their collection? The beauty of jewellery is that you can never have enough, and their collection can always grow, whether that be adding in a classic pair of diamond stud earrings, a vibrant pair of gemstone earrings or something more occasion-wear ready - the possibilities really are endless. Plus we’ll let you into a little secret too, when the person you love knows that your thought, time and effort has gone into picking a present, they’ll love it even more!
Diamond studded Leverback Solitaire Earrings
From £647
White Gold Round Diamond Halo Earrings
From £182
Toi Et Moi Sweetheart Diamond Stud Earrings
From £1,159
Split Prong Setting Diamond Hoop Earrings
From £134
4 Prong Setting Round Blue Sapphire Stud Earring
From £99
Gifts for the Necklace Lover
Does your partner love finishing their outfit off with a necklace? Simple, easy to wear and affordable too, picking the perfect pendant necklace is a great way to go if you’re on the hunt for a Valentine’s gift that’s sure to tick all the right boxes. The beauty of a necklace is its versatility too, and once you invest in a good quality chain, your partner can mix and match their pendants to match their look, and whenever an occasion arises, you can update their collection! It’s the perfect gift that keeps giving.
Toi Et Moi Sweetheart Diamond Pendant
From £619
Bezel Setting Diamond Solitaire Pendant
From £150
Channel Setting Round and Baguette Diamond Heart Pendant
From £1,783
Pave Setting Round Diamond Heart Pendant
From £44
Infinity Diamond Dainty Chain Necklace
From £282
Gifts for the Gold Lover
Go for gold when it comes to gifting this year and elevate their jewellery box with a gorgeous gold piece of jewellery. If your partner loves gold jewellery in general or likes to mix and match their jewels, wrapping up a new addition to their collection as a simple but sweet Valentine’s gift is set to be the way to go. From statement gold diamond rings to pendant necklaces or bracelets they can wear everyday, a piece of jewellery that you’ve really put your thought into is sure to always win gold.
Love Script Necklace
From £135
Evil Eye Delicate Everyday Chain Bracelet
From £90
Letter M Morse Code Diamond Initial Ring
From £198
Cresent Moon Hoop Earring Charm
From £71
Toi Et Moi Sweetheart Diamond Pendant
From £619
Gifts for Someone Who Loves Colour
If your partner loves anything that features a little bit of colour, we’ve got the most incredible selection of gemstone jewellery gifts that are really set to wow this Valentine’s day. From stunning sapphire earrings, elegant emerald jewellery pieces and so much more, jewellery isn’t always about diamonds and we love to go against the grain and add a pop of colour into our own jewellery collections every now and then. Not sure where to start with gemstones? Why not opt for their favourite colour? Or a gemstone that possibly symbolises something in your relationship, for example, Ruby jewellery is often a popular choice for Valentine’s as it symbolises love and passion.
4 Prong Setting Oval Blue Sapphire Stud Earring
From £202
4 Prong Setting Emerald Pendant
From £98
3 Prong Setting Pear Halo Ruby Pendant
From £166
Aquamarine Birthstone Tennis Bracelet
From £472
Freshwater Pearl And Pear Shaped Emerald Halo Earrings
From £918
Gifts for the Bracelet Lover
Adorn their wrist in diamonds this Valentine’s day and wrap up the ultimate jewellery present ready to give at a special meal or day out. What we love about bracelets is their versatility and ability to finish off any outfit effortlessly. From delicate chain bracelets to more unique script bracelets, you could even opt for an amethyst bracelet instead if it’s their birthstone and up the budget a little to mix the two occasions into one - we’re full of good ideas, we know.
Pavé-Set Clover Diamond Chain Bracelet
From £138
Love Script Bracelet
From £172
Pavé-Set Clover Diamond Station Bracelet
From £177
Amethyst Birthstone Tennis Bracelet
From £396
Prong Setting Bar Delicate Chain Bracelet
From £102
Valentine’s Proposal Pending?
Planning a big proposal for 2026? Why not choose Valentine’s as the perfect opportunity to get down on one knee. You can keep things intimate or really maximise the opportunity and get all the friends and family involved in the celebrations. Luckily for you, we’re here to take away the tough part of choosing the most incredible engagement ring with our top picks below.
Toi Et Moi Pear And Emerald Diamond Engagement Ring
From £825
Round Diamond Engagement Ring
From £734
Prong Set Round Side Stone Diamond Engagement Ring
From £822
White Gold Emerald Diamond Engagement Ring
From £547
Floral Petal Trilogy Diamond Engagement Ring
From £1,345
Gifts for Him
Sometimes one of the hardest tasks can be finding the perfect gift for him, but that’s where jewellery comes in to save the day. If the man in your life loves adding a piece of jewellery into their look before they walk out the door, our both classic and modern selection of rings, bracelets and stud earrings are set to be the ultimate gift they didn’t know they needed.
4 Prong Setting Diamond Men's Single Earring
From £84
Men's Signet Ring With Blue Sapphire Gemstone
From £644
Round Black Diamonds Tennis Bracelet
From £1,327
4 Prong Setting Black Diamond Men's Single Earring
From £272
Men's Bold Ring with Diamond Accent
From £862