The Complete Guide to Onyx & Statement Tiles

Onyx effect tiles and statement tiles create unforgettable feature walls. Our designers cover backlit onyx, terrazzo, metallic, where to use them and costs.

Onyx effect tiles are translucent-look porcelain tiles printed with high-definition technology to replicate the dramatic, luminous veining of natural onyx stone, and they are the most striking of a family of statement tiles designed to create a single, unforgettable focal surface.

Their signature trick is that they can be backlit: install a slim LED panel behind the tile and light glows through the veining, turning a feature wall, vanity front or bath surround into a glowing centrepiece. Because they are porcelain, they deliver that look without the fragility, porosity, sealing and very high cost of real onyx, and they are consistent, durable and virtually maintenance-free. Statement tiles more broadly, bold marble, terrazzo, metallic and concrete effect, work on the same principle: one considered focal surface, beautifully lit, against calmer surroundings. Used with restraint, they are the single most powerful move in a luxury interior; used everywhere, they overwhelm.

That is the direct answer. But the real skill with statement tiles is judgement: knowing which family to choose, where to place the one hero surface, how to light it, and, just as importantly, where not to use it. Effect porcelain is Design Di Lusso's exact specialism, and in this guide our design team shares exactly how we work with onyx and statement tiles, what they are, the statement families available, how onyx effect compares to the real stone, where to place and light a feature, what to outlay, and the mistakes that turn a showstopper into a mistake. This is the complete guide for homeowners and designers who want one surface that stops people in their tracks.

What are statement tiles, exactly?

Statement tiles are large-format, high-drama effect tiles used to create a single focal surface in a room, a feature wall, a vanity front, a bath surround or a shower niche, rather than to cover every surface. The whole idea rests on contrast: one bold, characterful surface reads as luxurious and deliberate precisely because the surfaces around it are calmer. Cover a whole room in a dramatic tile and the drama cancels itself out; the room simply looks busy.

The statement family includes several distinct looks, each with its own character, but they share three traits: they are visually bold, they are usually specified in large format so the pattern reads at full scale with minimal grout interruption, and they are designed to be the thing you notice first. Onyx effect is the most theatrical member of the family because of its unique translucency, but terrazzo, metallic, concrete-effect and bold marble all belong to it.

The reason statement tiles have become central to luxury interiors is simple. A calm, restrained scheme, marble-effect walls, wood-effect floors, quiet joinery, is beautiful but can feel safe. A single statement surface gives a room a focal point, a personality and a sense of occasion. The art is in choosing one, placing it well, and lighting it properly.

Onyx effect tiles: translucency and the backlit feature wall

Onyx is the most glamorous statement tile of all, because natural onyx is unlike any other stone: it is semi-translucent, so light can pass through it, and its veining is dramatic, layered and almost geological in its movement. Onyx effect porcelain captures that look, and the best ranges are engineered specifically so they can be backlit.

How translucency reads

Even unlit, onyx effect tiles have a depth and luminosity that other looks do not, the printed veining suggests light moving within the stone. On a vanity front, a bar front or a feature wall, that alone reads as unmistakably high-end. The colours run from warm honey and amber onyx through cool green and grey to dramatic dark onyx, each casting a completely different mood.

The backlit onyx wall

The signature move is to backlight it. A slim LED light panel is installed behind the tile, and light glows through the veining so the wall itself appears lit from within. A backlit onyx feature wall behind a bath, behind a vanity, or in a bar or hallway, is one of the most memorable things you can do in an interior. It works because onyx effect porcelain of controlled thickness lets enough light through to reveal the veining as a glowing map across the surface.

Getting a backlit onyx wall right is a build decision, not an afterthought. The LED panel, its power supply and access for maintenance all have to be planned in before tiling begins, and the tile thickness and translucency have to suit backlighting, not every "onyx" tile does. We cover the lighting detail in full below. For onyx specifically in a wet room, our companion guide answers the practical questions: are onyx tiles good for bathrooms.

The other statement families: terrazzo, metallic, concrete and bold marble

Onyx is the most theatrical, but it is far from the only way to make a statement. Each of these families creates a different kind of focal surface.

Bold marble, the dramatic Calacatta Viola, Nero Marquina and heavily veined ranges, makes a statement through sheer contrast and movement. It is the natural partner to a calmer scheme; pair one bold marble feature with quiet marble-effect tiles elsewhere and the feature sings.

Terrazzo effect brings a playful, textured, characterful surface of scattered chips in a matrix. Unlike most statement tiles it can carry a whole floor or even a whole room, because its pattern is even rather than directional, and it pairs beautifully with solid colours and warm timber.

Metallic effect tiles have a reflective, industrial-luxe quality, moody and glamorous, that works brilliantly as a feature wall, a splashback or inside a shower niche, especially against matt surfaces and dark joinery.

Concrete effect is the quiet statement: raw, contemporary and understated, it can serve as a calm whole-room base or as a deliberately restrained feature, and it pairs naturally with wood effect and greenery.

Natural onyx vs onyx effect porcelain: the honest comparison

Clients drawn to onyx often ask whether they should use the real stone. Here is the comparison our designers actually walk people through. Natural onyx is one of the most beautiful materials on earth, and also one of the most difficult and costly to live with. In almost every real-world interior, the porcelain version is the better decision.

A few points worth drawing out.

Fragility is natural onyx's hidden problem. It is a soft, brittle stone that chips and cracks more readily than marble, and it is porous, so it stains and must be sealed and resealed for life. In a bathroom, a bar or any working environment, that fragility is a constant liability. Onyx effect porcelain is hard, durable and impact-resistant, and never needs sealing.

Consistency matters more than people expect. Natural onyx varies dramatically slab to slab, so matching pieces, or simply getting the look you saw in a sample, is far from guaranteed. Porcelain gives you a consistent, repeatable result you can specify with confidence, which matters enormously on a designed scheme.

Cost is decisive. Natural onyx is a rare, expensive stone requiring specialist fabrication, and then it carries a lifetime of sealing and careful upkeep. Onyx effect porcelain sits in the premium tile bracket but at a fraction of the total cost of ownership.

Our clear recommendation: for a feature wall, a vanity front, a backlit panel or anything in a wet or working area, choose onyx effect porcelain. You get the luminous, backlit onyx look without the fragility, porosity, sealing and cost. The only time we would consider real onyx is a single, protected, dry showpiece in a project where the client fully accepts the fragility, sealing and lifetime care.

Where to use statement tiles, and where NOT to

This is where judgement matters most, and where honesty serves you better than hype. The same tile that makes a room unforgettable in the right place makes it exhausting in the wrong one.

Where statement tiles win

• A single feature wall. Behind a bath, behind a vanity, at the end of a hallway or behind a bed, one bold or backlit surface gives the room a focal point and a sense of occasion.
• Vanity and bath surrounds. Wrapping a vanity front or a bath panel in onyx effect, bold marble or metallic turns a functional object into a piece of furniture.
• Backlit panels. Onyx effect behind an LED panel, in a bathroom, a bar, a hallway or a dressing room, is the single most dramatic use of a statement tile.
• Shower niches and splashbacks. A small, contained dose of metallic, onyx or bold marble inside a niche or behind a hob adds a jewel-like moment without overwhelming.

Where NOT to use statement tiles

• Do not tile a whole room in a dramatic statement tile. A heavily veined onyx or bold marble across every wall and the floor reads as chaotic and claustrophobic, not luxurious. The drama depends on contrast; remove the calm surroundings and you remove the effect. Onyx effect and bold marble belong on one surface, not all of them.
• Do not use a translucent onyx look where it cannot be lit or seen properly. Onyx earns its cost through luminosity. On a cramped, poorly lit wall its magic is lost; place it where light, natural or LED, can do it justice.
• Do not compete two statements against each other. One hero surface per room. A backlit onyx wall and a bold terrazzo floor and a metallic vanity in the same room fight for attention and cancel out. Choose the one moment.
• Do not put a delicate statement in a high-abuse zone without thought. Metallic and polished finishes can show marks; keep them off high-traffic wet floors and choose slip-rated finishes for any floor.

The discipline of statement tiles is subtraction. Choose one surface, make it exceptional, and let everything around it stay calm. That single principle is what separates a designer scheme from an overloaded one, and it sits at the heart of every luxury bathroom design our team specifies.

How to light and backlight a statement wall

Lighting is what elevates a statement tile from attractive to unforgettable, and with onyx effect it is essential, because translucency only reads when light passes through or across the surface.

Backlighting an onyx effect wall

A backlit onyx wall is built around a slim LED light panel installed behind the tiling. Light passes through the controlled-thickness porcelain and glows through the veining. Getting it right depends on a few decisions taken before tiling:

• Plan the panel into the build. The LED panel, its transformer or driver, the power supply and access for future maintenance all have to be designed in before the tiles go on. Retrofitting a backlit wall means removing the tiles, so this is a first-fix decision.
• Choose a tile suited to backlighting. Not every onyx effect tile transmits light well; the thickness and the translucency of the finish matter. Specify a range intended for backlighting.
• Use an even panel, not spot lights. A continuous LED panel gives an even glow across the whole surface; individual spots create hot spots and dark patches that reveal the trick.
• Consider colour temperature. Warm light flatters honey and amber onyx; cooler light suits green and grey. The right temperature transforms the mood.

Lighting statement walls without backlighting

Not every statement wall is backlit, and the others depend on front lighting.

• Grazing light. A concealed light washing down or up a textured surface, terrazzo, concrete, structured metallic, rakes across the texture and brings it to life.
• Wall washers. For bold marble and flat statement surfaces, an even wall wash reveals the veining and colour without hot spots.
• Warm, layered light. Statement surfaces reward warm, layered lighting over a single bright ceiling light, which flattens everything. Plan the lighting alongside the tile, not after it.

The rule holds across the family: specify the lighting at the same time as the tile, because the two together are the feature, and the lighting is not something to add at the end.

How much do onyx and statement tiles cost?

Pricing varies by family, range, format and finish, but the essential point is this: statement tiles sit in the premium tile bracket, and because you use them on one focal surface rather than a whole room, the total cost is often more modest than clients expect, one hero wall, not an entire scheme. As a guide, our design team thinks in bands:

• Entry premium (around £40 to £70 per square metre). Convincing terrazzo, concrete-effect and entry onyx and metallic looks for a feature wall or splashback.
• Mid premium (around £70 to £110 per square metre). Richer onyx effect, bold marble and refined metallic ranges in large format with greater depth and realism.
• Top premium (£110 per square metre and upward). The most luminous onyx effect ranges engineered for backlighting, large-format bold marble and designer statement collections.

Two costs sit alongside the tiles. First, backlighting: an onyx feature wall needs the LED panel, driver, power supply and skilled first-fix installation, factor this in from the start of the build. Second, installation: large-format statement tiles demand a flat substrate and an experienced fitter, and backlit walls demand coordination between the tiler and the electrician. Because a statement is usually one surface, though, the investment is concentrated where it counts. Our team can give accurate, project-specific pricing once we understand your surface, range and lighting.

How to choose statement tiles: a designer's checklist

• Decide the one surface first. Choose the single feature, feature wall, vanity, bath surround, and design outward from it. One hero per room.
• Match the family to the mood. Onyx effect for luminous glamour, bold marble for dramatic contrast, terrazzo for playful character, metallic for industrial-luxe, concrete for restrained modernity.
• If you want backlighting, commit early. A backlit onyx wall is a first-fix build decision; plan the LED panel, power and access before tiling, and specify a tile suited to backlighting.
• Keep the surroundings calm. The drama depends on contrast. Pair a statement with quiet marble-effect, wood-effect or solid surfaces so the feature reads.
• Specify large format so the pattern reads at full scale with minimal grout interruption.
• Plan the lighting with the tile, not after. Grazing light, wall washing or backlighting is part of the feature.
• Match finish to location. Slip-rated finishes on any floor; keep delicate polished and metallic finishes off high-abuse wet floors.
• See it lit, at scale, before committing. A statement tile, and especially onyx, reads completely differently under proper lighting than on a small sample.

Common mistakes to avoid

• Using a statement everywhere. The most common and most damaging mistake. Cover a room in dramatic tile and the drama cancels out. One surface, calm surroundings.
• Backlighting as an afterthought. Deciding you want a backlit onyx wall after the tiles are on means tearing them off. Plan the panel, power and access before tiling.
• The wrong tile for backlighting. Not every onyx effect tile transmits light. Using a non-translucent tile behind an LED panel gives a dull, patchy glow. Specify a range made for it.
• Spot lights behind onyx. Individual spots create hot spots and dark bands; use an even LED panel for a uniform glow.
• Competing statements. Two or three bold surfaces in one room fight and cancel. Choose one hero.
• Ignoring slip and wear. Polished and metallic finishes can be slippery or mark-prone. Match finish to location and specify slip-rated floors.
• Choosing real onyx for a working space. Natural onyx is fragile, porous and needs constant care. For a feature that has to perform, onyx effect porcelain is the sound choice.

None of these are reasons to avoid statement tiles, they are reasons to specify them with discipline. Choose one surface, light it properly and keep its surroundings calm, and the cautions above simply do not arise.

Frequently asked questions

What are onyx effect tiles?

Onyx effect tiles are porcelain tiles printed with high-definition technology to replicate the translucent, dramatically veined look of natural onyx stone. The best ranges are engineered so they can be backlit: an LED panel behind the tile lets light glow through the veining. They give the luminous onyx look without the fragility, porosity, sealing and very high cost of the real stone, and they are durable, consistent and virtually maintenance-free.

Can you backlight onyx effect tiles?

Yes, backlighting is their signature use. A slim LED light panel is installed behind the tile and light glows through the veining, so the wall appears lit from within. It has to be planned into the build before tiling, because the panel, its power supply and access all sit behind the tile, and the tile must be a controlled thickness with a translucent-look finish suited to backlighting.

Are onyx tiles good for bathrooms?

Onyx effect porcelain is excellent for bathrooms because, unlike natural onyx, it is non-porous, durable and needs no sealing, so it handles moisture with ease. It makes a stunning backlit feature wall or vanity front. Natural onyx, being soft, porous and fragile, is far less suited to a wet, working bathroom. Our dedicated guide covers this in full.

What are statement tiles?

Statement tiles are large-format, high-drama effect tiles, onyx effect, bold marble, terrazzo, metallic and concrete effect, used to create a single focal surface such as a feature wall, vanity or bath surround, rather than to cover a whole room. Their impact depends on contrast: one bold surface against calm surroundings. Used with restraint, they are the most powerful move in a luxury interior.

Should I use natural onyx or onyx effect porcelain?

For almost every real-world interior, onyx effect porcelain is the better choice. Natural onyx is a rare, very costly stone that is soft, brittle and porous, needs sealing for life and varies unpredictably slab to slab. Onyx effect porcelain gives a consistent, durable, backlightable result at a far lower total cost, with no sealing. Real onyx suits only a single, protected, dry showpiece where the client accepts the upkeep.

Where should you use statement tiles?

On one focal surface per room: a feature wall behind a bath, bed or vanity, a bath surround, a vanity front, a shower niche or a splashback. Keep the surrounding surfaces calm so the statement reads. Avoid tiling a whole room in a dramatic statement tile, which cancels out the drama and can feel claustrophobic. One hero surface, beautifully lit, is the principle.

How do you light a statement wall?

It depends on the tile. Onyx effect is backlit with an LED panel behind the tile. Textured surfaces such as terrazzo, concrete and structured metallic come alive under grazing light that rakes across the texture. Flat statement surfaces such as bold marble suit an even wall wash. In all cases, plan the lighting at the same time as the tile, because the two together are the feature.

Are terrazzo and metallic tiles statement tiles?

Yes. Terrazzo effect, with its scattered chips and playful character, and metallic effect, with its reflective, industrial-luxe quality, both belong to the statement family, alongside onyx effect, bold marble and concrete effect. Terrazzo is unusual in that its even pattern can carry a whole floor or room, while metallic works best as a contained feature such as a wall, splashback or niche.

Bringing it together

Statement tiles, and onyx effect above all, are the most powerful single move in a luxury interior, but their power comes entirely from discipline. Choose one focal surface, a feature wall, a vanity, a backlit panel, make it exceptional, light it properly, and let everything around it stay calm. Onyx effect porcelain gives you the luminous, backlit magic of natural onyx without its fragility, porosity, sealing or cost; bold marble, terrazzo, metallic and concrete effect each offer a different kind of drama for a different mood. Get the placement and the lighting right, resist the temptation to make everything a statement, and one surface will give a whole room its personality and its sense of occasion. That judgement, one hero, calm surroundings, is exactly what our design team is here to help you get right.

See onyx & statement tiles in person at our Watford showroom

Onyx and statement tiles, more than any other, have to be seen lit and at full scale, a small sample cannot show you how an onyx effect wall glows when it is backlit, or how a bold marble reads across a whole feature. Visit our 7,000 sq ft showroom in Watford to experience our onyx effect, bold marble, terrazzo and metallic collections under proper lighting, see a backlit onyx wall in person, and plan your feature with our award-winning team. Whether you are a homeowner planning one unforgettable bathroom or a designer specifying a focal surface for a client, we will help you use statement tiles with the discipline that makes them sing, and every visit begins with a free design consultation.

Book your free consultation at our Watford showroom →

Design Di Lusso (DDL Tiles), Watford, Luxury Lifestyle Awards Top 100 Best of the Best 2025, and effect-porcelain specialists. Explore our onyx effect tiles, read whether onyx tiles are good for bathrooms, browse our marble-effect tiles, or plan a luxury bathroom design.