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Rare Black Onyx Slabs

Polished Black Onyx slab with amber-gold veining and smoky gray crystalline bands, displayed on a steel A-frame.
Polished Black Onyx slab measures 110″ × 75″, an exceptional size for natural onyx. A broad amber-gold vein crosses the black and smoky gray slab face.

Deep Black Color in an Exceptionally Large Slab Format

At 110″ × 75″, these polished Black Onyx slabs are exceptionally large for natural onyx. Finding slabs of this size with deep black and charcoal across much of the face is rarer still. Smoky gray crystalline bands and amber-gold veins break through the dark field, giving each slab a distinct pattern at full scale.

That scale gives designers room to lay out a feature wall, bar front, or fireplace surround around the character of a single slab. A broad black area can carry across the installation, with an amber vein placed where it will catch the eye. The placement of those features varies from slab to slab, which is why we recommend choosing from full-slab photographs or viewing the stone in person before finalizing the layout.

Black Onyx for Luxury Residential and Hospitality Interiors

Floor-to-ceiling Black Onyx fireplace surround with mirrored amber-gold veining and smoky gray bands above a linear firebox.
An AI-generated fireplace concept showing how bookmatching brings the amber-gold veining together above the firebox.

In a private residence, a polished Black Onyx fireplace surround can set the tone for an entire room. Deep black and charcoal give the surround visual weight, while amber-gold veining picks up the warmth of walnut or aged brass. In a powder room, a smaller cut with a concentrated band of color can make a custom vanity feel like a piece of furniture.

In hospitality interiors, the 110″ × 75″ slab format gives designers room to carry the stone’s pattern across a hotel reception desk or cocktail bar front. On a long bar, for example, a broad stretch of black can give the front a quiet rhythm, with the strongest amber veining reserved for the end guests see as they enter.

When the stone is this distinctive, it’s worth selecting the slab before finalizing the elevations. Seeing the full face gives the designer and fabricator a chance to place seams, corners, and openings around the formations that make that particular slab worth choosing.

Backlighting Amber Veins and Translucent Crystal

Backlit Black Onyx slab on a steel A-frame, with glowing golden pockets, smoky gray bands, and a broad copper-colored vein.
Backlighting brings out the translucent golden pockets and smoky gray bands in this Black Onyx slab while the denser black areas stay dark.

Choosing Your Slab for a One-of-a-Kind Installation

Backlit Black Onyx hotel bar front with glowing amber and cream crystalline bands, a brass foot rail, and walnut shelving.
An AI-generated hotel bar concept showing how strong backlighting can bring out the translucent areas of Black Onyx while the denser areas stay dark.

Even slabs cut from the same block can differ dramatically. Some have broad fields of deep black broken by a single amber vein. Others reveal more smoky gray crystal or several smaller pockets that glow when backlit. Our Silver Grey Onyx came from the same block and shows just how far the color can shift within one selection of stone.

Start with the full slab and the dimensions of the finished piece. On a fireplace surround, the opening may cut through the strongest vein. On a bar front, that same vein might be exactly what you want wrapping the corner. For a backlit installation, review the slab with light behind it before deciding which section to use.

If the project calls for more than one slab, we can review the available pieces side by side with you and your fabricator. It’s worth settling the layout early. Another slab may carry the same name, but the balance of black, amber, and translucent crystal is particular to the piece you choose.

View Black Onyx Slabs by Appointment in Los Angeles

See our polished 110″ × 75″ Black Onyx slabs by appointment at The World of Stone’s Los Angeles warehouse. Viewing the full slabs in person lets you compare the depth of the black, the placement of the amber veining, and where light passes through the stone.

Contact The World of Stone to schedule a viewing or request current slab photos, availability, and pricing. If you have drawings or finished dimensions, send them along so we can help you identify slabs that suit your layout. We ship throughout the contiguous United States.

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