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Check out these collections.

Allum & Sidaway Ear Styling Collection
Allum & Sidaway Engagement Collection
Initial Necklaces

Diamond Necklaces

Discover our immaculate selection of diamond necklaces at Allum & Sidaway, with a diverse range of necklaces to find your ideal match. Whether you’re looking for a statement piece or something more versatile, you can find diamond necklaces for women in a variety of cuts, colours, and carats to discover a diamond jewellery piece that you’ll cherish for years to come.

Diamond Necklaces

157 Results

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Fine Jewellery Jewellery 9ct Yellow Gold 0.51cttw Oval Cut Ruby & Diamond Necklace 1403267
New

9ct Yellow Gold 0.51cttw Oval Cut Ruby & Diamond Necklace

Fine Jewellery

£485.00

Clogau Jewellery Clogau 9ct Yellow Gold Diamond Paw Print Necklace 2104495

Clogau 9ct Yellow Gold Diamond Paw Print Necklace

Clogau

£740.00

Fine Jewellery Jewellery 9ct Yellow And White Gold Diamond Circle Necklace 1417320

9ct Yellow And White Gold Diamond Circle Necklace

Fine Jewellery

£395.00

Fine Jewellery Jewellery 9ct White Gold 0.30ct Diamond Solitaire Necklace 1417058

9ct White Gold 0.30ct Diamond Solitaire Necklace

Fine Jewellery

£985.00

Fine Jewellery Jewellery 9ct White Gold 0.04ct Diamond Initial A Necklace 1417127

9ct White Gold 0.04ct Diamond Initial A Necklace

Fine Jewellery

£330.00

18ct Yellow Gold 0.85cttw Pear Cut Ruby & Diamond Halo Necklace
New

18ct Yellow Gold 0.85cttw Pear Cut Ruby & Diamond Halo Necklace

Fine Jewellery

£3,175.00

18ct Yellow Gold 0.41cttw Oval Cut Emerald & Diamond Halo Necklace
New

18ct Yellow Gold 0.41cttw Oval Cut Emerald & Diamond Halo Necklace

Fine Jewellery

£1,800.00

18ct Yellow Gold 0.32cttw Oval Cut Emerald & Diamond Necklace
New

18ct Yellow Gold 0.32cttw Oval Cut Emerald & Diamond Necklace

Fine Jewellery

£1,230.00

Allum & Sidaway 9Y Dia 0.06ct Cross Pdnt 1408291
New

9ct Yellow Gold 0.06ct Round Brilliant Cut Diamond Cross Necklace

Fine Jewellery

£325.00

9ct White Gold 0.06ct Diamond Cross Necklace
New

9ct White Gold 0.06ct Round Brilliant Cut Diamond Cross Necklace

Fine Jewellery

£325.00

18ct Yellow Gold 0.32cttw Octagonal Cut Aquamarine & Diamond Necklace
New

18ct Yellow Gold 0.32cttw Octagonal Cut Aquamarine & Diamond Necklace

Fine Jewellery

£1,315.00

9ct Yellow, Rose & White Gold 0.11ct Diamond Circle Necklace
New

9ct Yellow, Rose & White Gold 0.11ct Diamond Circle Necklace

Fine Jewellery

£745.00

18ct Yellow Gold 0.51ct Round Brilliant Cut Diamond Circle Necklace
New

18ct Yellow Gold 0.51ct Round Brilliant Cut Diamond Circle Necklace

Fine Jewellery

£1,985.00

18ct Yellow Gold 0.23ct Round Brilliant Cut Diamond Bubble Circle Necklace
New

18ct Yellow Gold 0.23ct Round Brilliant Cut Diamond Bubble Circle Necklace

Fine Jewellery

£2,100.00

18ct Yellow Gold 0.40ct Round Brilliant Cut Diamond Triple Knot Necklace
New

18ct Yellow Gold 0.40ct Round Brilliant Cut Diamond Triple Knot Necklace

Fine Jewellery

£2,430.00

18ct Yellow Gold 0.46ct Round Brilliant Cut Diamond Bubble Circle Necklace
New

18ct Yellow Gold 0.46ct Round Brilliant Cut Diamond Bubble Circle Necklace

Fine Jewellery

£3,330.00

Platinum 0.42ct Diamond Flower Cluster Necklace
New

Platinum 0.42ct Diamond Flower Cluster Necklace

Fine Jewellery

£1,885.00

9ct White Gold 0.11ct Round Brilliant Cut Diamond Open Heart Necklace
New

9ct White Gold 0.11ct Round Brilliant Cut Diamond Open Heart Necklace

Fine Jewellery

£625.00

9ct White Gold 0.25ct Round Brilliant Cut Diamond Heart Cluster Necklace
New

9ct White Gold 0.25ct Round Brilliant Cut Diamond Heart Cluster Necklace

Fine Jewellery

£945.00

18ct Yellow Gold 0.45ct Round Brilliant Cut Diamond Peacock Necklace
New

18ct Yellow Gold 0.45ct Round Brilliant Cut Diamond Peacock Necklace

Fine Jewellery

£2,525.00

18ct White Gold 0.91cttw Marquise Cut Emerald & Diamond Necklace
New

18ct White Gold 0.91cttw Marquise Cut Emerald & Diamond Necklace

Fine Jewellery

£3,845.00

18ct White Gold 0.61cttw Marquise Cut Emerald & Diamond Necklace
New

18ct White Gold 0.61cttw Marquise Cut Emerald & Diamond Necklace

Fine Jewellery

£2,650.00

18ct White Gold 0.51cttw Oval Cut Emerald & Diamond Necklace
New

18ct White Gold 0.51cttw Oval Cut Emerald & Diamond Necklace

Fine Jewellery

£1,845.00

9ct White Gold 0.80cttw Oval Cut Sapphire & Diamond Halo Necklace
New

9ct White Gold 0.80cttw Oval Cut Sapphire & Diamond Halo Necklace

Fine Jewellery

£995.00

9ct Yellow Gold Diamond Bubble Bar Necklace
New

9ct Yellow Gold Diamond Bubble Bar Necklace

Fine Jewellery

£445.00

Fine Jewellery Jewellery 9ct Yellow Gold Round Brilliant Cut Diamond Circle Necklace 1417480
Fine Jewellery Jewellery 9ct Yellow Gold Round Brilliant Cut Diamond Circle Necklace 1417480
New

9ct Yellow Gold Round Brilliant Cut Diamond Circle Necklace

Fine Jewellery

£485.00

Fine Jewellery Jewellery 9ct Yellow Gold 0.13ct Pavé Diamond Heart Necklace 1417481
New

9ct Yellow Gold 0.13ct Pavé Diamond Heart Necklace

Fine Jewellery

£650.00

Allum & Sidaway Jewellery 9ct Yellow Gold 0.53cttw Oval Cut Peridot & Diamond Necklace 1405818
New

9ct Yellow Gold 0.53cttw Oval Cut Peridot & Diamond Necklace

Allum & Sidaway

£625.00

Allum & Sidaway Jewellery 18ct Yellow Gold 0.49cttw Pear Opal & Diamond Cluster Necklace 1406419
New

18ct Yellow Gold 0.49cttw Pear Opal & Diamond Cluster Necklace

Allum & Sidaway

£2,100.00

Allum & Sidaway Jewellery 9ct White Gold 0.86ct Princess Cut Ruby & Diamond Necklace 1403264
New

9ct White Gold 0.86ct Princess Cut Ruby & Diamond Necklace

Allum & Sidaway

£820.00

Allum & Sidaway Jewellery 18ct White Gold 0.67cttw Octagonal Cut Emerald & Diamond Necklace 1404162
New

18ct White Gold 0.67cttw Octagonal Cut Emerald & Diamond Necklace

Allum & Sidaway

£2,690.00

Fine Jewellery Jewellery 18ct White, Yellow and Rose Gold 0.37ct Diamond Triple Heart Necklace 1417475
New

18ct White, Yellow and Rose Gold 0.37ct Diamond Triple Heart Necklace

Fine Jewellery

£2,375.00

Fine Jewellery Jewellery 18ct White Gold 0.55ct Diamond Cross Necklace 1408289
New

18ct White Gold 0.55ct Diamond Cross Necklace

Fine Jewellery

£2,475.00

Fine Jewellery Jewellery 18ct White Gold 0.14ct Diamond Open Work Heart Necklace 1417471
New

18ct White Gold 0.14ct Diamond Open Work Heart Necklace

Fine Jewellery

£925.00

Allum & Sidaway Jewellery 18ct White Gold 0.51cttw Oval Aquamarine & Diamond Rubover Necklace 1415049

18ct White Gold 0.51cttw Oval Aquamarine & Diamond Rubover Necklace

Allum & Sidaway

£1,185.00

Fine Jewellery Jewellery 18ct Yellow Gold 0.89cttw Marquise Emerald & Diamond Necklace 1404160

18ct Yellow Gold 0.89cttw Marquise Emerald & Diamond Necklace

Fine Jewellery

£3,955.00

Fine Jewellery Jewellery 9ct Yellow Gold 0.64ct Step Cut Tanzanite & Diamond Necklace 1411095

9ct Yellow Gold 0.64ct Step Cut Tanzanite & Diamond Necklace

Fine Jewellery

£1,285.00

Fine Jewellery Jewellery 18ct Rose Gold 0.36ct Coffee Diamond Cluster Necklace 1417324

18ct Rose Gold 0.36ct Coffee Diamond Cluster Necklace

Fine Jewellery

£2,150.00

Fine Jewellery Jewellery Platinum 0.42ct Diamond Cluster Necklace 1417419

Platinum 0.42ct Diamond Cluster Necklace

Fine Jewellery

£2,150.00

Fine Jewellery Jewellery 18ct Yellow Gold 0.65ct Diamond Double Flower Necklace 1417435

18ct Yellow Gold 0.65ct Diamond Double Flower Necklace

Fine Jewellery

£3,795.00

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Diamond Necklaces with Timeless Elegance

Diamond necklaces are designed to stand out, and our many brilliant choices will be sure to make your outfits all the more memorable. From pendant necklaces in ornate, sophisticated designs to tennis necklaces that highlight every gemstone, there are plenty of diamond necklaces for women that are sure to appeal, whether you’re treating yourself or searching for an extra special gift.

Lab-Grown Diamond Necklaces

In our selection of diamond necklaces, you can find many pieces that are crafted using lab-grown diamonds. By choosing these lab-grown diamond necklaces, you benefit from diamonds that are visually and physically identical to natural diamonds while coming to you at a much lower price. This gives you the opportunity to choose larger carat weights and even distinctive colours while still remaining within your original budget.

If you have any questions about our diamond necklaces or any other pieces from our wider collection of jewellery, contact us today. A member of our experienced team will be happy to assist you.