For most UK buyers, the best lab grown diamond eternity ring is a half eternity band in white or yellow gold with 0.50ct to 1.00ct of total diamond weight. Choose a full eternity band for unbroken sparkle, a channel-set band for daily wear, a multi-row band for impact, or a bespoke ring when you want the carat weight, metal and width exactly right.

The hard part is comparing like with like. UK listings quote total carat weight, stone grades, metals and sale prices in different ways, and a ring that looks cheap may use tiny stones in silver. This guide sets out five options, who each one suits and what you should expect to pay.

A Star Diamonds is a family-run jeweller in Hatton Garden, London, established in 2016 and working with both natural and lab grown diamonds, so the first option is the route we know best. Prices below are indicative figures from UK retailer listings, so check the current price before you buy.

1. Bespoke eternity ring made in Hatton Garden

A bespoke ring is the best choice when no ready-made listing matches your carat weight, stone shape or finger size. A Star Diamonds designs and makes bespoke wedding bands in its Hatton Garden workshop.

How it works

The process starts with a relaxed consultation where you share your ideas and inspiration. Designs then move from hand-drawn sketches to detailed 3D renderings before the ring is handcrafted in Hatton Garden. Allow 4 to 6 weeks, depending on complexity.

Goldsmiths, designers and gemologists guide your choices, from stone shape to metal. A Star Diamonds offers 100% conflict-free lab grown diamonds. An eternity band is a diamond-set wedding band, so confirm your exact design at the consultation.

A bespoke ring costs you time, not choice: you fix every detail before a single stone is set.

Who it suits

Bespoke works best in these cases:

• You need a non-standard size, width or stone shape.
• You want the band to sit flush against an existing engagement ring.
• You want a valuation certificate for insurance.

It is a poor fit if you need the ring within days, because a made-to-order ring takes weeks.

Carats, metals and price

Bespoke pricing depends on stone count, total carat weight and metal, so there is no fixed figure to quote. Ask for a written quote, which A Star Diamonds locks for 14 days.

• Payment: major cards, with instalments allowed if the full amount is paid before collection or delivery.
• Aftercare: lifetime free resizing, polishing and cleaning, plus free engraving. Ask how resizing applies to a full eternity design.
• Returns: made-to-order rings cannot be returned, so settle the design before you commit.

2. Full eternity ring

A full eternity ring carries diamonds all the way round the band, so you see sparkle from every angle. It is the classic anniversary choice.

How it looks and wears

Round brilliant stones are the most common, while princess and baguette stones give a sharper, more architectural line. Listings commonly run from about 2.5mm to 5mm wide.

Because the stones continue under the finger, the ring can spin without hiding any sparkle. The same feature makes resizing difficult or impossible on many designs, so buy it only when you are sure of your size.

A full eternity ring is the most striking style and the hardest to resize, so measure twice.

Who it suits

• Choose it if you want the traditional look and your finger size is stable.
• Choose it if you plan to wear it alone or beside a plain band.
• Skip it if your hands change size, or you do heavy manual work.

Carats, metals and price

Total carat weight is the figure to compare. Ask for it along with the colour and clarity range, because stones this small are not usually certified individually.

• 0.25ct in sterling silver: from about £160.
• 0.50ct to 1.00ct in gold or platinum: roughly £600 to £1,100 on typical listings.
• 1.5ct and above in gold: around £900 to £1,000 on sale at the lower end, rising with stone size.

Platinum, white, yellow and rose gold are the usual metals. Silver is cheapest but softer and wears faster.

3. Half eternity ring

A half eternity ring has diamonds across the top and sides only, with a plain metal underside. It is the most practical pick for most buyers.

How it looks and wears

Stones usually cover about half to two thirds of the band. The plain section sits against your palm, so it feels more comfortable and keeps the diamonds facing outwards where they catch the light.

Resizing is usually far easier than on a full eternity band, because the metal section can be adjusted. It also stacks neatly beside an engagement ring.

If you want sparkle without the resizing risk, a half eternity ring is the safest buy.

Who it suits

• Choose it if you want a daily-wear band that stacks with an engagement ring.
• Choose it if you want more carat weight for your budget.
• Skip it if you want diamonds visible all the way round.

Carats, metals and price

Half eternity rings in gold are listed at roughly £560 to £950 by UK retailers, depending on stone size and metal.

A worked example shows how this fits a typical budget. Pair a lab grown engagement ring such as our Windermere or Talia, each £2,450, with a half eternity band at £600 to £950. The pair costs about £3,050 to £3,400.

Round stones are the most common. Baguette and princess cuts cost a similar amount.

4. Channel-set eternity ring

A channel-set eternity ring holds the diamonds between two walls of metal, so nothing sticks up to snag. It is the best choice for hands that work.

How it looks and wears

The stones sit flush with the band, giving a smooth, sleek line that slides under gloves and sleeves. The metal walls shield the stone edges from knocks, which is where diamonds most often chip.

Less light reaches the sides of each stone, so the sparkle is a little more restrained than in a claw setting. Diamond itself is the hardest gem, so wear on a ring comes from the setting, not the stone.

Choose channel setting when durability matters more than maximum sparkle.

Who it suits

• Choose it if you wear the ring daily, including at the gym or the keyboard.
• Choose it if claws catching on knitwear would annoy you.
• Skip it if you want the airy, high-sparkle look of open claws.

Carats, metals and price

Channel-set round bands are listed at about £700 to £1,000 in gold, close to claw-set prices. A bezel setting, which wraps each stone fully, starts a little lower, around £600 on sale.

Metal matters more here. Platinum is dense and hard-wearing. 9ct gold is harder than 18ct because of its higher alloy content, though 18ct has a richer colour. Choose the metal that matches your engagement ring to avoid visible colour mismatch.

5. Multi-row eternity ring

A multi-row eternity ring stacks two, three or more lines of diamonds into one wide band. It is the statement option and the one that shows off lab grown value best.

How it looks and wears

Three rows of stones create a broad, cocktail-ring effect that works as an anniversary gift or a dress ring. Total carat weight climbs quickly, so the ring looks far larger than a single-row band.

The width means it sits best on its own. Beside a slim engagement ring it can crowd the finger, so try it on next to your existing ring before you buy.

Multi-row bands turn carat weight into visible impact, but they dominate whatever sits beside them.

Who it suits

• Choose it if you want a bold ring to wear alone.
• Choose it if you prefer a dress-ring look to a traditional band.
• Skip it if you need a slim band to stack with an engagement ring.

Carats, metals and price

Three-row and triple-row gold rings are listed at roughly £1,500 to £2,000. Five-stone and seven-stone designs sit lower, from about £1,000 to £1,100 on sale.

The same metal choices apply: platinum for durability, gold in three colours for warmth. Because lab grown stones cost less than mined ones, a multi-row ring puts more total carats within a given budget than a natural diamond ring would.

Choosing your eternity ring

Pick the style first, then the carat weight and metal. A half eternity band suits most people, a full eternity band suits those with a settled ring size, channel setting suits hard-working hands, and a multi-row band suits a bold, solo ring. Bespoke is the route when you want every detail fixed to your hand and taste.

Whichever you choose, ask for the total carat weight, colour and clarity range, and written terms on resizing and returns before you pay.

To talk through a design, speak to A Star Diamonds about a bespoke lab grown eternity ring and see what a Hatton Garden workshop can make for you.