Among all natural stones, onyx stands alone with one rare property: it transmits light. Place a light source behind a thin onyx slab and its veins turn into glowing golden arteries. This is not a design trick — it is the nature of the stone itself.

Why does onyx transmit light?

Onyx is a form of alabaster created by calcium carbonate deposited in caves and hot springs, layer upon layer over thousands of years. These parallel layers form extremely slowly, producing regular, tightly bonded crystals that let light pass through rather than bounce off.

Cut to the right thickness (usually 1 to 2 cm) and lit from behind, onyx reveals an internal structure that is completely invisible in ordinary light — strata in honey, amber and caramel.

Types of illuminated pieces

Illuminated tables

An onyx top or base with integrated LED lighting. A table by day, a source of ambient light by night.

Wall panels

A large backlit onyx slab as a feature wall — popular in lobbies and reception areas.

Lamps and décor pieces

Smaller items, ideal as a gift or to add a warm glow to a corner.

How to choose an illuminated onyx piece

  • Light source: always choose LED, never traditional bulbs. LEDs run very cool, and high heat can damage the stone or cause cracking over time
  • Colour temperature: warm light (2700–3000 K) brings out the golden and honey tones; cool light makes onyx look pale and lifeless
  • Distribution: the light must be spread evenly behind the whole slab, otherwise you get bright patches and dark ones
  • Thickness: thinner transmits more light but is structurally weaker — good pieces balance the two
  • Veining: ask for a photo of the piece lit, because its appearance switched off is completely different

Where to place it for the best effect

  • In soft ambient lighting — the glow disappears entirely in a brightly lit room
  • Away from direct sunlight, which can fade the colours over the years
  • As the single focal piece; its glow needs no visual competition
  • In living rooms, hotel lobbies, executive offices, and behind bars

Caring for illuminated onyx

Onyx is softer and more porous than marble, so:

  • Clean with a soft cloth and water only, and avoid acidic cleaners entirely
  • Reseal roughly every 6 months
  • Never place hot objects directly on it
  • Check the lighting connections periodically

In short

Illuminated onyx is not merely furniture but a work of art that changes with the light — calm by day, captivating by night. If you want one piece that transforms how a room feels, this is it.

See our illuminated onyx pieces — each one handcrafted and unique in its veining.

Why light passes through onyx

Onyx forms from fine calcite crystals arranged in parallel layers, and that arrangement lets light travel through rather than bounce off. The result is stone that glows from within rather than from its surface — an effect no coating or print can imitate.

The thinner the slab, the more light passes. That is why illuminated onyx is cut thinner than ordinary marble.

What makes a good onyx piece?

  • Even light distribution across the whole slab — scattered bright spots mean cheap lighting.
  • Warm light (2700-3000K) shows the honey and gold tones truthfully. Cool white makes the stone look washed out.
  • A low-heat LED source — heat damages both the stone and the resin.
  • Access to the lighting so it can be serviced later without breaking anything.

Where to put it

Illuminated onyx gives its best where the ambient light can be turned down:

  • A side table by the sofa in a living room you dim in the evening.
  • An entrance hall — the first thing a guest sees.
  • Behind a bar or in a seating corner.

Put it in a room that is bright all day and you lose half its value.

Care: gentler than marble

Onyx is more fragile and more porous:

  • Do not put heavy weights or hot dishes on it.
  • Wipe spills immediately — it absorbs faster.
  • Clean with a soft cloth and water only, and never an acidic cleaner.
  • Switch the light off when not in use to extend the unit's life.
See what is available in side and accent tables, or order a sample to watch the light pass through it yourself.