Side Stone Engagement Rings: A UK Buyer's Guide (2026)

A side stone engagement ring is a ring where the centre diamond is flanked by smaller accent diamonds — either set into the shoulders of the band or standing as distinct side stones next to the centre. It's one of the most flexible engagement ring styles: it adds sparkle and presence without changing the character of the centre diamond, and it works beautifully in bespoke designs.

If you love the clarity of a solitaire but want a little more brilliance, or you love the drama of a trilogy but want the centre stone to remain the clear focal point, a side stone ring usually sits comfortably in the middle.

What is a side stone engagement ring?

A side stone engagement ring features a single centre diamond with one or more smaller diamonds set on either side of it. Depending on the design, the side stones can be:

• Set into the shoulders of the band (often called "diamond shoulders" or "diamond-set shoulders")
• Set as distinct side stones next to the centre (sometimes referred to as accent stones)
• Shaped stones such as tapered baguettes, pear cuts or marquise cuts placed alongside the centre

Side stones are usually round brilliants, but tapered baguettes, half-moons, trapezoids, pears and marquises are all popular choices for a more distinctive design.

Side stone vs solitaire vs trilogy: what's the difference?

The three styles look similar at a glance but behave very differently on the finger.

• Solitaire: a single centre diamond, no accent stones. Clean, timeless, and lets the centre stone speak for itself.
• Side stone: a centre diamond with smaller accents that support, rather than compete with, the main stone.
• Trilogy (three stone): three diamonds of comparable size, usually representing past, present and future.

The key distinction is proportion. A trilogy ring shares attention across three near-equal stones. A side stone ring keeps the visual weight firmly on the centre diamond — the accents are there to lift and frame it.

If you like the idea of a trilogy but want the centre stone to stay the star, a side stone design is often the better answer. If you like the calm of a solitaire but want a little more sparkle across the finger, side stones give you that without overwhelming the design.

You can explore the difference across our engagement rings collection, or compare styles more directly in our guides on solitaire and halo settings and trilogy rings.

Popular side stone styles UK buyers are choosing

A few side stone designs come up repeatedly in bespoke consultations. Each has a distinct personality.

Diamond-set shoulders

Small round diamonds are pavé or channel set along the shoulders of the band, leading the eye toward the centre stone. This is the most versatile side stone style — it feels modern but not trend-led, and it pairs beautifully with almost any wedding band.

Best for: buyers who want extra brilliance across the finger and a design that will still feel current in twenty years.

Tapered baguette side stones

Two long, gently narrowing baguette diamonds sit flush against the centre stone. It's an Art Deco-inspired look that feels architectural and elegant, and it makes the centre diamond look larger by drawing the eye inward.

Best for: buyers drawn to vintage-inspired or Art Deco design, and those choosing an emerald or asscher cut centre.

Half-moon or trapezoid side stones

Curved half-moon or trapezoid diamonds hug the centre stone with almost no visible gap. It's a bolder, more sculptural look that works particularly well with cushion, radiant and emerald cut centres.

Best for: buyers who want a distinctive, considered design that still reads as classic.

Pear or marquise side stones

Two pointed diamonds sit on either side of the centre stone, tips angled outward. This is a more romantic, floral silhouette that has gained real momentum in bespoke commissions recently.

Best for: buyers looking for something distinctive and softer in feel, often paired with an oval or round brilliant centre.

Coloured side stones

Sapphires, emeralds or rubies used as accents rather than diamonds. This is a beautiful option for buyers who want personal meaning built into the ring — a birthstone, a family stone, or simply a colour that suits the wearer.

Best for: buyers who want a personal, meaningful detail that feels bespoke by design.

Choosing the centre stone

Because side stones frame the centre diamond, the centre stone choice really matters. A few practical points to consider:

• Round brilliant centres pair well with almost any side stone style and are the safest choice if you're unsure.
• Oval and pear centres suit pear or marquise side stones for a soft, elongated silhouette.
• Emerald, asscher and radiant centres look striking with tapered baguettes or trapezoids, which reinforce the geometric feel.
• Cushion centres are flattered by half-moon side stones, which echo the softness of the shape.

If you're still unsure which centre diamond shape suits your partner's taste, our guides on how to choose a diamond shape and the individual shape pages (oval, round brilliant, emerald, pear, cushion) are a useful starting point.

Certification matters just as much on a side stone ring as it does on a solitaire. Look for a GIA or IGI certified centre stone — the accent stones are usually described as a total carat weight rather than individually graded, which is standard practice. For more on grading, see GIA's guidance on the 4Cs.

Best metals for side stone engagement rings

The metal you choose will change how the side stones read on the finger.

• Platinum: the most popular UK choice for side stone rings. Its cool, bright tone matches diamond colour perfectly, and its density holds small accent stones securely for the long term.
• 18ct white gold: a very similar look to platinum at a slightly lower price point, though it will need re-rhodium plating over the years.
• 18ct yellow gold: a warmer, more distinctive look. Yellow gold shoulders with white diamond accents have become increasingly popular for buyers wanting a modern-classic feel.
• 18ct rose gold: softer and romantic, particularly beautiful with pear or marquise side stones.

If you're weighing metal options in more depth, we cover the differences in our guides on platinum vs 18ct white gold, yellow gold engagement rings and rose gold engagement rings. Every ring we make is fully hallmarked to UK standards — you can read more about UK hallmarking at the Birmingham Assay Office.

How Diamond Hub approaches bespoke side stone rings

Side stone rings are one of the most rewarding styles to design bespoke, because the number of variables — centre stone, side stone shape, side stone size, setting style, metal — means no two rings need look the same.

A typical bespoke process at Diamond Hub looks like this:

1. Consultation. We talk through inspiration, budget, wearer's style, and any considerations like whether the ring needs to sit flush with a wedding band later.
2. Diamond selection. We source and present certified centre diamond options that match your brief. Side stones are matched carefully to the centre for colour and clarity.
3. Design. We produce CAD renders and, where useful, a resin model so you can see the proportions before we commit to metal.
4. Craft. The ring is hand-finished in the UK, fully hallmarked, and delivered with certification.

If you'd like to see how the process works end-to-end, our bespoke page walks through it in detail.

What to consider before buying

A few practical points that come up often in consultations:

• Wedding band fit. Some side stone designs sit flush with a plain wedding band; others need a shaped or fitted band. Decide early — it changes the design.
• Everyday wear. Pavé shoulders are secure but do need occasional checks over the years. Bezel-set or channel-set side stones tend to be the most robust for very active wearers.
• Proportions. The side stones should support the centre, not compete with it. As a rough guide, tapered baguettes are typically around a third of the centre stone's length; round accent shoulders are usually 1.2–1.5mm.
• Certification. The centre stone should be GIA or IGI certified. Ask for the certificate before the ring is made, not after.
• Insurance and valuation. Any engagement ring above a certain value should be insured. We supply a valuation document with every ring for exactly this reason.

FAQ

What is a side stone engagement ring? A side stone engagement ring has a single centre diamond flanked by smaller accent diamonds — either set into the shoulders of the band or as distinct stones alongside the centre. The side stones frame the centre without competing with it.

Are side stone rings more expensive than solitaires? Usually a little more, because there's extra diamond weight and more setting work involved. The difference is often smaller than buyers expect, especially on rings with pavé shoulders. In a bespoke commission, side stones are one of the easiest ways to add presence without moving to a much larger centre diamond.

Are side stone engagement rings good for everyday wear? Yes, when the design is well made. Well-set pavé shoulders, channel-set accents and bezel-set side stones are all secure for daily wear. As with any ring, we recommend an annual check with your jeweller to confirm the settings remain tight.

Do side stone rings sit flush with a wedding band? Some do, some don't. Rings with lower-set side stones or diamond shoulders often pair beautifully with a plain band. Rings with prominent baguette or half-moon side stones may need a shaped or fitted wedding band. We design this in from the start on bespoke commissions.

What's the difference between a side stone ring and a trilogy ring? Both feature a centre stone with diamonds on either side, but proportions differ. In a trilogy, all three diamonds are close in size; in a side stone ring, the centre is clearly the focal point and the accents support it.

Can I have coloured side stones instead of diamonds? Absolutely — sapphires, emeralds and rubies all make beautiful accent stones. It's a popular way to add personal meaning (a birthstone, a family stone) or simply a distinctive palette. This is one of the most common bespoke requests we see.

A final thought

Side stone rings suit buyers who love the clarity of a classic engagement ring but want a little more presence and personality. They're one of the most flexible styles for bespoke design — the range of centre stone shapes, side stone cuts, metals and settings means the ring can feel truly personal without ever tipping into over-designed.

If you'd like to talk through options, our team runs private consultations in Leicester and London to help you shape a design that's right for your partner. You can book a consultation or browse our engagement rings collection to see current examples in every style.