Random Natural Stone Mosaic
Irregular stone pieces hand-set on mesh with an unrepeating joint pattern — the most organic of the mosaic formats and the one that hides substrate movement best.
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Volcanic basalt
Black Lava Stone
Indonesian basalt from the Java volcanic belt, quarried as a dense dark stone with fine natural porosity. Specified where architecture calls for depth, matte darkness and a surface that stays visually calm in strong sunlight.
Deep volcanic black with a naturally porous character.
Black Lava Stone is a basalt formed from cooled volcanic flow along the Java volcanic belt. Its surface carries fine vesicular porosity — the pinholes left by gas as the lava set — which is what separates it visually from a manufactured dark tile and gives the material its depth under raking light.
It is a hard, dimensionally stable stone that takes a flamed, bush hammered or honed finish equally well. Architects specify it for dark-bottom pools, monolithic facades, stair treads and terraces where a matte, non-reflective black is wanted rather than a polished one.
Because the porosity is open, we recommend a penetrating sealer for interior floors and any surface exposed to oil or food. For exterior and submerged applications the stone is normally left unsealed.
At a glance
Material Data
| Also known as | Basaltina, Indonesian Basalt, Batu Lava Hitam |
|---|---|
| Stone category | Volcanic basalt |
| Origin | Volcanic belt of Central and East Java, Indonesia |
| Natural colour | Charcoal to near-black, with the characteristic fine vesicular porosity of cooled lava. |
| Available finishes | Flamed, Honed, Bush hammered, Sandblasted, Natural split, Brushed |
| Standard sizes | 100 × 100 mm · 150 × 300 mm · 200 × 400 mm · 300 × 300 mm · 300 × 600 mm · 600 × 600 mm · 600 × 900 mm · Free length |
| Thickness | 15 mm · 20 mm · 30 mm · 40 mm · Custom to project |
| Applications | Wall cladding, Facades, Dark-bottom pools, Paving and terraces, Stair treads, Feature walls, Landscape |
| Packaging | Individually protected, stacked on edge in fumigated wooden crates with plywood facing and steel strapping. Palletised, stencil-marked and inventoried per crate. |
| Minimum order | 1 × 20ft container |
Technical Information
Black Lava Stone technical data
Typical ranges for Indonesian material. Where your specification requires documented values, request test data with your enquiry and we will confirm what we can provide for that batch before you order.
| Property | Typical value |
|---|---|
| Stone type | Vesicular basalt (volcanic) |
| Bulk density | 2,600 – 2,900 kg/m³ |
| Water absorption | 3 – 6 % (open porosity) |
| Compressive strength | 80 – 130 MPa |
| Flexural strength | 10 – 16 MPa |
| Slip resistance | R11 – R12 flamed / bush hammered |
| Abrasion resistance | High — suitable for commercial traffic |
| Sealing | Penetrating sealer recommended for interior floors |
Gallery
Black Lava Stone in use
Products
Produced in Black Lava Stone
Strip Stone Mosaic
Narrow horizontal stone strips set in offset courses — a calm, linear mosaic that visually widens a wall and suits contemporary architecture.
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Stacked Stone Mosaic Panel
Multi-height stone courses stacked with no visible grout line, producing the dry-stone wall look in a modular fixed panel.
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Split Face Stone Mosaic
Stone split along its natural fracture rather than sawn, leaving a raised irregular face that throws deep shadow across the wall.
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Hexagon Stone Mosaic
Precision-cut stone hexagons on mesh — the most specified geometric mosaic for bathrooms, kitchens and contemporary interior floors.
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Crazy Paving Stone
Large irregular flagstones with fitted joints, supplied loose by the square metre or mesh-mounted for faster installation.
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Interlocking Stone Mosaic
Panels cut with an interlocking profile so adjacent modules key into each other and the panel joint becomes invisible.
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Ledgestone Panel
Thin uniform-height stone courses stacked tight into a panel — a more disciplined, contemporary relative of stacked stone.
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Applications
Where Black Lava Stone is specified
Questions
Black Lava Stone — FAQ
On exterior and submerged surfaces, no — rain and pool water clear the surface. On interior floors and kitchen surfaces we recommend a penetrating impregnating sealer, reapplied roughly every two to three years depending on traffic.
Any dark stone absorbs solar heat. For barefoot pool decks in high-sun markets we usually recommend a lighter coping — andesite or limestone — with lava stone used on walls and waterline instead.
Yes. 15–20 mm panels are standard for adhered cladding. For mechanically fixed rainscreen systems specify 30 mm and send the fixing detail so we can machine the kerfs or anchor holes.
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