BBy Bikram Nath·Researched from UK Amazon listings·Updated 2026-10-17·6 products compared
Disclosure: As an Amazon Associate I earn from qualifying purchases. This guide contains Amazon affiliate links, and we may earn a commission — at no extra cost to you — but it never changes our rankings.
What are the best eternity rings to buy in the UK?
Our top pick for Eternity Rings in the UK is the BuyFineDiamonds 2.0mm 0.50 Carat Round Diamond Pave Set Full Eternity Ring in White Gold.
The BuyFineDiamonds 2.0mm 0.50 Carat Round Diamond Pave Set Full Eternity Ring suits buyers who want graded diamonds all the way round, in hallmarked 9k white gold.
The BuyFineDiamonds full eternity ring is our top pick because its listing states 0.50 carat of round diamonds, pave set, with diamond colour G-H and clarity I, in 9k (375) white gold hallmarked by the London Assay Office. For 18ct gold, the Naava lists a half carat diamond full eternity ring in 18 ct white gold, hallmarked according to UK law; for a half eternity ring with natural diamonds, the TJC lists five round natural diamonds on 18K gold vermeil over 925 sterling silver.
This guide compares six eternity rings from BuyFineDiamonds, Naava, TJC, SUGARKITTEN LONDON, SHELOVES and Citerna, using what each listing states: metal, stones, half or full eternity, size and hallmarking. Three listings set diamonds (BuyFineDiamonds, Naava and TJC) and three set cubic zirconia (SUGARKITTEN LONDON, SHELOVES and Citerna).
Buying guide
What should you look for in Eternity Rings?
1Stones: diamonds on the BuyFineDiamonds (0.50 carat, colour G-H, clarity I), Naava (half carat, per the title) and TJC (five round natural diamonds, single cut); cubic zirconia on the SUGARKITTEN LONDON (1mm pave set), SHELOVES (princess cut, per the title) and Citerna (round cut).
2Metal: 18 ct white gold (Naava); 9k (375) white gold (BuyFineDiamonds); 18K yellow gold vermeil over 925 sterling silver (TJC); sterling silver on the SUGARKITTEN LONDON, SHELOVES and Citerna, the last two stated as solid 925 sterling silver.
3Half or full: the BuyFineDiamonds and Naava titles say full eternity; the TJC and SUGARKITTEN LONDON say half eternity, and the SHELOVES listing describes a half circle of white cz. The Citerna is a five-stone ring.
4Hallmark: BuyFineDiamonds names a London Assay Office hallmark; Naava and Citerna say their products are hallmarked according to UK law and include a certificate of authenticity. The TJC, SUGARKITTEN LONDON and SHELOVES listings do not mention a hallmark in the features we read.
5Sizing and warranty: SUGARKITTEN LONDON lists sizes D to V (13 - 20.2mm inside diameter), and TJC says its range fits true to size. SHELOVES states an extended 180-day warranty and BuyFineDiamonds a 30 Days Free Return or Exchange; the Naava, TJC, SUGARKITTEN LONDON and Citerna listings state no warranty term.
Our process
How do we choose our picks?
We don’t lab-test products ourselves. Instead we synthesise current Amazon UK listings and published specs into clear, honest recommendations. We earn a commission if you buy through our links, but that never changes which products we rank.
Current UK availability
We check each pick against live Amazon UK catalogue data rather than last year’s model lists. Stock moves fast, so a listing can sell out after we publish.
Published specs
We compare manufacturer specifications so each pick is right for a real budget and use-case.
UK-specific fit
We factor in UK voltage and plug/fitting standards — details that generic global lists miss.
Sterling silver, rhodium finish (rose gold and 18K gold finishes also listed)
Solid 925 sterling silver
Solid 925 sterling silver
Stones
0.50 carat round diamonds; colour G-H, clarity I
Half carat of diamonds (per the title)
Five round natural diamonds, single cut, four-prong set
1mm pave-set cubic zirconia
Cubic zirconia, princess cut (per the title)
Round cut cubic zirconia
Style
Full eternity, pave set
Full eternity
Half eternity
Half eternity
Half circle of white cz
Five-stone
Size
P
—
K; fits true to size
I1/2; range D to V (13 - 20.2mm inside diameter)
L 1/2
—
Hallmark
Authenticated by the London Assay Office
Hallmarked according to UK law; certificate of authenticity
—
—
—
Hallmarked according to UK law; certificate of authenticity
The rankings
The best Eternity Rings, ranked
1
BuyFineDiamonds
Top Pick
BuyFineDiamonds 2.0mm 0.50 Carat Round Diamond Pave Set Full Eternity Ring in White Gold
The BuyFineDiamonds 2.0mm 0.50 Carat Round Diamond Pave Set Full Eternity Ring suits buyers who want graded diamonds all the way round, in hallmarked 9k white gold.
Metal
9k (375) white gold
Stones
0.50 carat round diamonds; colour G-H, clarity I
Style
Full eternity, pave set
Band
2.0mm (per the title)
Size
P
Hallmark
Authenticated by the London Assay Office
What we like
+Grades its diamonds: colour G-H, clarity I
+9k (375) gold with a London Assay Office hallmark, per the listing
+Says other clarity and colour grades and metals including platinum are available on request
+30 Days Free Return or Exchange
Worth noting
–The gold is 9k (375); the listing says other metals can be chosen by contacting the seller
Naava 18 ct White Gold Half Carat Diamond Full Eternity Ring
The Naava 18 ct White Gold Half Carat Diamond Full Eternity Ring suits buyers who want a full eternity ring in 18ct gold, hallmarked according to UK law.
Metal
18 ct white gold
Stones
Half carat of diamonds (per the title)
Style
Full eternity
Hallmark
Hallmarked according to UK law; certificate of authenticity
What we like
+18 ct white gold, per the listing
+Hallmarked according to UK law with a certificate of authenticity
+Naava describes its collection as certified diamond jewellery
+Presented in a Naava branded gift box
Worth noting
–The listing gives no diamond colour or clarity grade
–The listing gives no ring size or band width in the features we read
The TJC Diamond Half Eternity Ring suits buyers who want natural diamonds in a slim yellow gold look over sterling silver, with a stated true-to-size fit.
Metal
925 sterling silver with 18K yellow gold vermeil
Stones
Five round natural diamonds, single cut, four-prong set
Style
Half eternity
Size
K; fits true to size
What we like
+Five round natural diamonds, each in a four-prong setting, per the listing
+TJC says the 18K gold vermeil layer is around five times thicker than standard gold plating
+TJC says the range fits true to size
+Slim band that the listing says stacks beside an engagement ring
Worth noting
–Gold vermeil over sterling silver, not solid gold
–The listing does not mention a hallmark or a diamond grade in the features we read
SUGARKITTEN LONDON Sterling Silver Half Eternity 1mm Pave Set CZ Stack Ring
The SUGARKITTEN LONDON Sterling Silver Half Eternity 1mm Pave Set CZ Stack Ring suits buyers who want a thin stacking band, with stated sizes from D to V and three finishes.
Metal
Sterling silver, rhodium finish (rose gold and 18K gold finishes also listed)
Stones
1mm pave-set cubic zirconia
Style
Half eternity
Band
1.5mm thick
Size
I1/2; range D to V (13 - 20.2mm inside diameter)
What we like
+States its band (1.5mm thick) and stone size (1mm)
+Sizes D to V with inside diameters of 13 - 20.2mm, per the listing
+Three finishes listed: rhodium, rose gold and 18K gold
+Packed in cotton-filled boxes with anti-tarnish resealable bags
Worth noting
–Cubic zirconia, not diamond
–The listing does not mention a hallmark or a warranty term in the features we read
SHELOVES 925 Sterling Silver Princess Cut CZ Eternity Ring
The SHELOVES 925 Sterling Silver Princess Cut CZ Eternity Ring suits buyers who want a sterling silver half eternity look with a stated 180-day warranty.
Metal
Solid 925 sterling silver
Stones
Cubic zirconia, princess cut (per the title)
Style
Half circle of white cz
Size
L 1/2
Warranty
Extended 180-day warranty
What we like
+States an extended 180-day warranty, with a replacement or money back for a faulty item or missing stone
+Solid 925 sterling silver, per the listing
+Comes with a gift box
Worth noting
–Cubic zirconia, not diamond
–The listing does not mention a hallmark in the features we read
BuyFineDiamonds is the one listing here that grades its diamonds (colour G-H, clarity I); Naava names a half carat and TJC five round natural diamonds, neither with a grade. Band measurements are stated for the BuyFineDiamonds (2.0mm, in the title) and SUGARKITTEN LONDON (1.5mm thick) and not on the other four. The Naava listing gives no ring size in the features we read.
Our Take
As a default, the BuyFineDiamonds full eternity ring: 0.50 carat of graded round diamonds (G-H, I) in 9k white gold hallmarked by the London Assay Office, per its listing. For 18ct gold, the Naava lists 18 ct white gold with a half carat of diamonds. For a slim stacking band, the SUGARKITTEN LONDON lists a 1.5mm sterling silver half eternity band with 1mm pave-set CZ.
Questions & answers
Frequently asked questions
What is a half eternity ring?
The TJC Diamond Half Eternity Ring's listing describes five round natural diamonds running across the top of the band in a half eternity line, and the SHELOVES eternity ring is set with a half circle of white cz. The BuyFineDiamonds and Naava rings in this guide are named full eternity rings in their titles.
Which eternity rings have real diamonds?
The BuyFineDiamonds 0.50 carat full eternity ring, the Naava 18 ct white gold half carat diamond full eternity ring and the TJC Diamond Half Eternity Ring are listed with diamonds, and TJC says its five are natural. The SUGARKITTEN LONDON, SHELOVES and Citerna rings are set with cubic zirconia.
Are eternity rings hallmarked?
The BuyFineDiamonds full eternity ring is 9k (375) gold with a hallmark authenticated by the London Assay Office, and Naava and Citerna say their products are hallmarked according to UK law. The TJC, SUGARKITTEN LONDON and SHELOVES listings do not mention a hallmark in the features we read.
What colour and clarity are eternity ring diamonds?
The BuyFineDiamonds 0.50 carat full eternity ring lists diamond colour G-H and clarity I, and says SI, VS and VVS clarity and DE, FG and HI colour are available on request. The Naava and TJC diamond listings give no colour or clarity grade.
Which eternity rings are sterling silver?
The SUGARKITTEN LONDON half eternity ring, the SHELOVES princess cut CZ eternity ring and the Citerna five-stone ring are sterling silver. The TJC Diamond Half Eternity Ring is 925 sterling silver coated with 18K gold vermeil.
What sizes do eternity rings come in?
The SUGARKITTEN LONDON half eternity ring lists sizes D to V (13 - 20.2mm inside diameter), and TJC says its half eternity range fits true to size. The BuyFineDiamonds listing shown is size P and the SHELOVES princess cut ring size L 1/2.
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