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The name ‘diamond’ comes from the Greek adamas, which means unbreakable or unalterable. Diamonds are believed to be the stronger natural substance found on Earth, as they’re a 10 on the Mohs scale of hardness. They’re also among the most valuable gemstones known to man due to their rarity and innate beauty once cut and polished into various shapes.

Diamonds are cut to create facets and prisms that refract light entering the stone to create that sparkle and fire synonymous with this gemstone. These gems have been hugely sought-after for centuries, worn by royalty, nobility and public figures alike – and popular for engagement and eternity rings for their timeless appeal and elegant character.

Diamonds are the birthstones for April and the stone for the 60th and 75th wedding anniversaries, so why not browse our vast selection of diamond jewellery online to find the perfect gift for your loved one?

The Four Cs

Something to consider when looking to buy diamond jewellery is the four Cs: cut, clarity, carat, and colour. No diamond is the same, even if they look similar, and the four Cs are what differentiates them and gives them their value.
It’s important to be aware of these features because you don’t want to end up paying too much for clarity or cut, for instance, or prioritise carat to the detriment of the other aspects. So, when searching for a new diamond jewellery piece, you’ll need to take all factors into account at the same time.


Diamonds may also appear colourless, but they actually vary in hues, which could be light yellow or truly colourless, which are extremely rare. There are also coloured diamonds, such as red gems, which undergo specific treatments that augment colour.


This feature refers to the way the diamond is faceted. A stone that has been cut well will let in the most light possible and allow it to reflect between the facets, which means that it will have a lot of brilliance. The higher the quality of the cut, the higher the value is.


Carat refers to the weight of the stone, with heavier diamonds being more valuable than ones with fewer carats. When you have several gems in one luxury diamond jewellery piece, for example, they’re all weighed together, not separately. So, for example, the carat amount you see on our offerings, such as the 0.85ct Diamond Half Eternity Five Stone Ring in Platinum, is the total weight of all diamonds.


No stone is ‘perfect’, and that includes diamonds. Diamonds have inclusions – or natural flaws – that take away from their value, so they’re ranked on a scale as well. When you’re looking to buy high-end diamond jewellery, you’ll see that the most valuable stones are the ones with the fewer number of inclusions.

Buy Diamond Jewellery at New Cavendish Jewellers

At New Cavendish Jewellers, you can find fantastic, certificated diamonds, diamond-set eternity rings, diamond cocktail rings, diamond earrings, diamond studs, diamond pendants and diamond necklaces alongside dramatic diamond bracelets to fit every budget and style.
Our diamonds also come in a variety of shapes, from pear to round, so you can expect a huge selection of jewellery pieces for all tastes and occasions. We can help you make the right decision if you’re unsure which piece to purchase, as we specialise in luxury jewellery in London.
All our diamond jewellery is also exclusively set in platinum or 18ct white gold, rose gold or yellow gold, all high-end materials that enhance the beautiful stones. The perfect addition to any jewellery box, our pieces can elevate an outfit, subtly shine on your skin, or make a bold statement – it’s up to you!
Browse online or visit us in-store to discover our sensational collection of diamond jewellery on finance.

Get in Touch with Us About Our Diamond Jewellery

Are you looking for diamond jewellery in London? We’ve got everything you could possibly want, from gorgeous earrings to unique rings for every event, be it an engagement or simply ‘just because’.
We also offer many other gemstone jewellery, such as emerald and ruby, so why not call us on 020 7487 5628 to speak to a friendly and knowledgeable member of staff or send us a message to, and we’ll be happy to chat with you about the piece you’re looking for. Alternatively, you can talk to us on WhatsApp as well (078 6730 7597).

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