Onyx is a translucent natural stone, softer than marble, that people choose for how it looks with light behind it. Plan the slab, the lighting and the support together, and it can carry a bar, a powder room vanity or a whole wall.
Many onyx slabs let light through, which granite and quartzite do not. Warm backlighting brings out layers, clouding and bands you can barely see in ordinary room light, so we look at each slab both lit and unlit before you approve the layout.
Onyx is softer and more acid-sensitive than granite, quartzite or engineered quartz. It can scratch and etch, so sealing, careful cleaning and the right application matter.
We recommend it for lower-wear and vertical features: illuminated bar fronts, powder-room vanities, fireplace details, reception desks and bookmatched wall panels.
A backlit bar or reception front is the classic use, because the stone can glow without taking the daily wear of a working kitchen. Powder rooms and feature walls work well too, as long as the rest of the room is quiet enough to let the stone stand out.
Bookmatching opens two neighboring slabs like a book so the pattern mirrors across the joint. We photograph each slab, test the lighting and plan seams, outlets and panel joints before anything is cut.
Onyx needs continuous support, careful handling and a lighting cavity designed before the stone is templated. We coordinate the slab layout, substrate, access panels, diffuser placement and edge details so the finished surface glows evenly without hot spots.
Behind the stone sits a shallow cavity lined with LED panels or strips and a diffuser, so the light spreads evenly instead of showing as lines. An access panel lets an electrician reach the lights later without touching the onyx.
The corners are mitered so the pattern wraps around them, and the panels are supported along their full length because onyx cracks under point loads. We work out all of it with your contractor and electrician before we template.
The ones we hear most at the yard. Anything else, call us at 203-717-1978.
We do not recommend it for a working kitchen. It is softer than marble and etches easily, so knives, pans and lemon juice will mark it quickly. On a bar top, a powder room vanity or a wall it lasts well.
The stone sits in front of a shallow cavity lined with LED panels or strips and a diffuser, with an access panel so the lights can be serviced. We plan the cavity, support and seams together before templating.
Yes. We seal it at installation, and it needs resealing more often than most stones. Clean it with a pH-neutral cleaner and wipe up anything acidic right away.
Yes, when sequential slabs from the same block are available. The two slabs open like a book so the pattern mirrors at the joint, which works especially well on walls and bar fronts.
Onyx is softer and more fragile than marble, so it is handled, cut and supported with extra care in our Bridgeport shop and installed by our own crew. If you want a similar look for a working surface, compare marble and quartzite, and see the full range on our materials page. Read how to care for onyx before you choose it.
Onyx looks completely different lit from behind, and the only way to judge a slab is to see it both ways. Bring your drawings and lighting plan, and we will hold the slab up to the light with you.
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