Diamond Necklaces & Pendants in Solid 9ct, 14ct & 18ct Gold

A diamond necklace is the piece most people wear every single day, which is exactly why the chain matters as much as the stone. Plated chains wear through at the clasp and at the point where they sit against the collarbone. Every Qutahia diamond pendant necklace is built on a solid gold chain in 9ct, 14ct or 18ct — hypoallergenic, and made to be worn rather than kept in a box.

💎 Natural & Lab Grown Diamonds🔗 Solid Gold Chain Included🛡️ Hypoallergenic — No Plating🚚 Free Insured Delivery
Natural & lab grown diamonds
Solid gold, never plated
Free insured UK delivery

89 products

Choosing a Diamond Necklace Setting

The setting changes both the look and the practicality of a diamond necklace. A solitaire diamond pendant holds a single stone in four or six claws, lifting it away from the metal so light passes through from every side — the brightest option. A halo pendant rings that centre stone with smaller diamonds, which adds visible size without the carat price. Bezel and rub-over settings ring the stone in a collar of gold: slightly less sparkle, far more security, and nothing to catch on jumpers or hair. Illusion and cluster settings set small diamonds as one so the piece reads considerably larger than its carat weight. Floating pendants suspend the stone with minimal visible metal for a barely-there effect.

Necklace Length — Getting It Right

Length decides where the pendant sits and whether it layers well. 16 inches sits at the base of the throat, close to a choker on most adults. 18 inches is the standard UK length and falls just below the collarbone — the safest choice if you are buying as a gift. 20 inches sits at the top of the neckline and works well over knitwear. If you already own a chain, measure it flat before ordering rather than guessing.

Which Gold for a Diamond Pendant?

9ct gold is the hardest alloy and the most resilient for a chain worn continuously. 14ct offers a warmer colour with strong durability. 18ct gold is 75% pure with the deepest, richest tone, traditionally used for fine diamond jewellery. White gold gives a cooler, more contemporary contrast against a colourless stone; yellow gold warms it; rose gold softens it. None of them will turn your skin green, because none of them are plated brass.

Explore the Diamond Collection

Match your necklace with diamond earrings, browse diamond rings, diamond eternity rings and diamond bracelets, or view the complete diamond collection. Looking for something commissioned to your own design? Start your bespoke design.

Diamond Necklace Questions, Answered

What length diamond necklace should I buy?
18 inches is the standard UK length and suits most adults, sitting just below the collarbone. Choose 16 inches for a closer fit at the throat, or 20 inches if you want the pendant to sit lower or to layer with a shorter chain.
Can I shower or sleep in a diamond necklace?
Solid gold will not tarnish in water, so a quick shower will not harm it. We would still avoid it — soap builds up under the setting and dulls the stone. Sleeping in a fine chain is the most common cause of kinks and snapped links.
How big should a diamond pendant be?
For everyday wear, 0.05ct to 0.15ct sits neatly and reads as jewellery rather than statement. Above 0.25ct the stone becomes the focal point of an outfit. A halo or illusion setting is worth considering if you want visual size without the carat price.
Is the chain included with the pendant?
Yes. Every diamond pendant comes on a solid gold chain in the matching carat and colour — not a plated substitute, which is a common shortcut elsewhere.
Will a gold necklace irritate sensitive skin?
Irritation is almost always a reaction to nickel in plated or filled jewellery. Solid 9ct, 14ct and 18ct gold is naturally hypoallergenic and safe for pierced or sensitive skin.
How do I stop a fine chain from tangling?
Store it fastened and lying flat rather than coiled, and hang it if you can. Most tangles form in a jewellery box where the chain is free to fold back on itself.