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Check out these collections.

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

Diamond Jewellery

Discover our diamond jewellery collection at Allum & Sidaway, where exceptional craftsmanship meets enduring elegance. Including beautifully crafted diamond rings, refined diamond necklaces, elegant diamond earrings, and many more captivating choices, each piece is designed to be treasured for a lifetime.

Diamond Jewellery

747 Results

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Fine Jewellery Jewellery 18ct yellow gold 0.60ct yellow diamond 3 stone ring 0103459
21% off

18ct yellow gold 0.60ct yellow diamond 3 stone ring

Fine Jewellery

£5,350.00 £4,250.00

Fine Jewellery Jewellery 18ct yellow gold 0.76ct yellow diamond 3 stone ring 0103458
29% off

18ct yellow gold 0.76ct yellow diamond 3 stone ring

Fine Jewellery

£4,950.00 £3,500.00

Fine Jewellery Jewellery 18ct yellow gold 0.71ct yellow diamond 3 stone ring 0103456
17% off

18ct yellow gold 0.71ct yellow diamond 3 stone ring

Fine Jewellery

£6,650.00 £5,495.00

Fine Jewellery Jewellery Platinum 0.30ct diamond halo ring 0101927

Platinum 0.30ct diamond halo ring

Fine Jewellery

£2,325.00

Fine Jewellery Jewellery Platinum 2.47ct diamond solitaire ring with diamond set shoulders 0101922
5% off

Platinum 2.47ct diamond solitaire ring with diamond set shoulders

Fine Jewellery

£28,950.00 £27,500.00

Fine Jewellery Jewellery Platinum 0.25ct diamond pear twist cluster ring 0111417
23% off

Platinum 0.25ct diamond pear twist cluster ring

Fine Jewellery

£1,295.00 £995.00

Allum & Sidaway Jewellery A&S Engagement Collection 18ct yellow gold 0.25ct diamond solitaire ring 0120202

A&S Engagement Collection 18ct yellow gold 0.25ct diamond solitaire ring

Allum & Sidaway

£1,695.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Fan Single Stud Earring 1222163
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Fan Single Stud Earring 1222163

A&S Ear Styling Collection 14ct Yellow Gold Diamond Fan Single Stud Earring

Allum & Sidaway

£310.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Scattered Diamond Single Stud Earring 1222162
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Scattered Diamond Single Stud Earring 1222162

A&S Ear Styling Collection 14ct White Gold Scattered Diamond Single Stud Earring

Allum & Sidaway

£165.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Triple Diamond Star Single Stud Earring 1222160
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Triple Diamond Star Single Stud Earring 1222160

A&S Ear Styling Collection 14ct White Gold Triple Diamond Star Single Stud Earring

Allum & Sidaway

£245.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Triple Diamond Star Single Stud Earring 1222159
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Triple Diamond Star Single Stud Earring 1222159

A&S Ear Styling Collection 14ct Yellow Gold Triple Diamond Star Single Stud Earring

Allum & Sidaway

£245.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Triple Baguette Cut Diamond Fan Single Stud Earring 1222157
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Triple Baguette Cut Diamond Fan Single Stud Earring 1222157

A&S Ear Styling Collection 14ct Yellow Gold Triple Baguette Cut Diamond Fan Single Stud Earring

Allum & Sidaway

£145.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 2mm Rubover Diamond Single Stud Earring 1222155
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 2mm Rubover Diamond Single Stud Earring 1222155

A&S Ear Styling Collection 14ct Yellow Gold 2mm Rubover Diamond Single Stud Earring

Allum & Sidaway

£130.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Diamond Side Set Single Hoop Earring 1222128
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Diamond Side Set Single Hoop Earring 1222128

A&S Ear Styling Collection 14ct White Gold Diamond Side Set Single Hoop Earring

Allum & Sidaway

£245.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Side Set Single Hoop Earring 1222127
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Side Set Single Hoop Earring 1222127

A&S Ear Styling Collection 14ct Yellow Gold Diamond Side Set Single Hoop Earring

Allum & Sidaway

£245.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 3 Stone Diamond Side Set Single Hoop Earring 1222122
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 3 Stone Diamond Side Set Single Hoop Earring 1222122

A&S Ear Styling Collection 14ct Yellow Gold 3 Stone Diamond Side Set Single Hoop Earring

Allum & Sidaway

£195.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Diamond Tooth Single Stud Earring 1222120
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold Diamond Tooth Single Stud Earring 1222120

A&S Ear Styling Collection 14ct White Gold Diamond Tooth Single Stud Earring

Allum & Sidaway

£125.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Tooth Single Stud Earring 1222119
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Tooth Single Stud Earring 1222119

A&S Ear Styling Collection 14ct Yellow Gold Diamond Tooth Single Stud Earring

Allum & Sidaway

£125.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold 2mm Diamond Side Set Single Hoop Earring 1222115
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold 2mm Diamond Side Set Single Hoop Earring 1222115

A&S Ear Styling Collection 14ct White Gold 2mm Diamond Side Set Single Hoop Earring

Allum & Sidaway

£165.00

Fine Jewellery Jewellery 9ct Yellow Gold 0.05ct Diamond Fern Stud Earrings 1220084
25% off

9ct Yellow Gold 0.05ct Diamond Fern Stud Earrings

Fine Jewellery

£395.00 £295.00

Fine Jewellery Jewellery 18ct Yellow Gold 1.60ct Diamond Bangle 1113115
Fine Jewellery Jewellery 18ct Yellow Gold 1.60ct Diamond Bangle 1113115
27% off

18ct Yellow Gold 1.60ct Diamond Bangle

Fine Jewellery

£5,400.00 £3,950.00

Fine Jewellery Jewellery 18ct White Gold 2.55ct Diamond Bangle 1113112
Fine Jewellery Jewellery 18ct White Gold 2.55ct Diamond Bangle 1113112
31% off

18ct White Gold 2.55ct Diamond Bangle

Fine Jewellery

£6,900.00 £4,750.00

Fine Jewellery Jewellery Platinum 0.83ct Princess Cut Diamond Solitaire Ring 0121020
27% off

Platinum 0.83ct Princess Cut Diamond Solitaire Ring

Fine Jewellery

£5,450.00 £3,995.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Star Single Stud Earring 1222123
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold Diamond Star Single Stud Earring 1222123

A&S Ear Styling Collection 14ct Yellow Gold Diamond Star Single Stud Earring

Allum & Sidaway

£99.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct White Gold 3mm Diamond Single Stud Earring 1222101

A&S Ear Styling Collection 14ct White Gold 3mm Diamond Single Stud Earring

Allum & Sidaway

£385.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 3mm Diamond Single Stud Earring 1222100
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 3mm Diamond Single Stud Earring 1222100

A&S Ear Styling Collection 14ct Yellow Gold 3mm Diamond Single Stud Earring

Allum & Sidaway

£385.00

Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 2mm Diamond Single Stud Earring 1222088
Allum & Sidaway Jewellery A&S Ear Styling Collection 14ct Yellow Gold 2mm Diamond Single Stud Earring 1222088

A&S Ear Styling Collection 14ct Yellow Gold 2mm Diamond Single Stud Earring

Allum & Sidaway

£130.00

Fine Jewellery Jewellery Platinum 0.60ct Diamond Cluster Ring With Stone Set Shoulders 0111409
22% off

Platinum 0.60ct Diamond Cluster Ring With Stone Set Shoulders

Fine Jewellery

£2,550.00 £1,995.00

Fine Jewellery Jewellery 18ct White Gold 0.26ct Diamond Cluster Ring 0111243
19% off

18ct White Gold 0.26ct Diamond Cluster Ring

Fine Jewellery

£1,100.00 £895.00

Fine Jewellery Jewellery Platinum 1.00ct Diamond Half Eternity Ring 0114036
22% off

Platinum 1.00ct Diamond Half Eternity Ring

Fine Jewellery

£3,850.00 £2,995.00

Fine Jewellery Jewellery 9ct Yellow Gold Diamond Interlocked Circles Stud Earrings 1210943
17% off

9ct Yellow Gold Diamond Interlocked Circles Stud Earrings

Fine Jewellery

£415.00 £345.00

Fine Jewellery Jewellery Platinum 0.75ct Salt And Pepper Diamond Halo Ring 0111395
25% off

Platinum 0.75ct Salt And Pepper Diamond Halo Ring

Fine Jewellery

£2,125.00 £1,600.00

Fine Jewellery Jewellery 18ct White Gold 0.50ct Diamond Necklace 1417279
21% off

18ct White Gold 0.50ct Diamond Necklace

Fine Jewellery

£2,345.00 £1,850.00

Fine Jewellery Jewellery 18ct White Gold 0.40ct Diamond Stud Earrings 1210936
Fine Jewellery Jewellery 18ct White Gold 0.40ct Diamond Stud Earrings 1210936
26% off

18ct White Gold 0.40ct Diamond Stud Earrings

Fine Jewellery

£1,480.00 £1,100.00

Fine Jewellery Jewellery 18ct White Gold 0.35ct Diamond Openwork Half Eternity Ring 0107136
25% off

18ct White Gold 0.35ct Diamond Openwork Half Eternity Ring

Fine Jewellery

£1,320.00 £995.00

Fine Jewellery Jewellery 9ct White Gold 1.00ct Diamond Classic Tennis Bracelet 1106134
Fine Jewellery Jewellery 9ct White Gold 1.00ct Diamond Classic Tennis Bracelet 1106134
25% off

9ct White Gold 1.00ct Diamond Classic Tennis Bracelet

Fine Jewellery

£2,650.00 £1,995.00

Fine Jewellery Jewellery 9ct White Gold 0.14ct Diamond Hook Earrings 1210913
Fine Jewellery Jewellery 9ct White Gold 0.14ct Diamond Hook Earrings 1210913
27% off

9ct White Gold 0.14ct Diamond Hook Earrings

Fine Jewellery

£650.00 £475.00

Fine Jewellery Jewellery 9ct White Gold 0.27ct Diamond Cluster Necklace 1417256
22% off

9ct White Gold 0.27ct Diamond Cluster Necklace

Fine Jewellery

£1,150.00 £895.00

Fine Jewellery Jewellery 9ct White Gold 0.04ct Diamond Initial J Necklace 1417128

9ct White Gold 0.04ct Diamond Initial J Necklace

Fine Jewellery

£340.00

Fine Jewellery Jewellery 9ct Yellow Gold 0.16ct Diamond Heart Necklace 1417126
32% off

9ct Yellow Gold 0.16ct Diamond Heart Necklace

Fine Jewellery

£995.00 £675.00

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Discover Our Selection of Diamond Jewellery

Our immaculate collection of diamond jewellery at Allum & Sidaway features a divine range of options to help you find the perfect choice, whether you’re treating that special someone or yourself. No matter if you’re looking for an everyday contemporary piece or wedding jewellery that your partner will cherish for years to come, you can find exceptional choices to suit all needs and tastes here. 

Laboratory-Grown Diamond Jewellery

In our collection, you can find many exquisite laboratory-grown diamond jewellery pieces. These retain all of the qualities of natural diamonds, while being significantly more affordable and conflict-free. With these choices, you can shop hand-crafted diamond jewellery that not only comes at a much lower price but has also been sourced from fully ethical origins.

If you’d like to know anything more about our UK diamond jewellery collection or any of our other timeless jewellery pieces, contact us today, and a member of our experienced team will gladly assist you.