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 andesite
Andesite Stone
A dense grey volcanic stone with high compressive strength and very consistent colour. The most widely specified Indonesian stone for paving, cladding, coping and high-traffic commercial surfaces.
The grey workhorse of Indonesian architectural stone.
Andesite is the structural backbone of Indonesian architectural stone. Quarried across Java, it is hard, dimensionally stable, and unusually consistent in colour for a natural material — which is why it is specified on large commercial areas where batch-to-batch variation would be visible.
Its strength makes it appropriate for surfaces that take real load: hotel driveways, plazas, stair treads, public paving and pool surrounds. Bush hammered and flamed finishes give a genuinely high slip rating wet, which matters for pool decks and hospitality projects with liability requirements.
We produce andesite in calibrated tiles, cut-to-size panels, coping with machined profiles, and stacked-stone cladding. Large-format and free-length pieces are available where the block permits.
At a glance
Material Data
| Also known as | Batu Andesit, Indonesian Grey Stone, Java Andesite |
|---|---|
| Stone category | Volcanic andesite |
| Origin | Central and West Java, Indonesia |
| Natural colour | Even mid-grey to dark grey, with a fine uniform grain and minimal veining. |
| Available finishes | Bush hammered, Honed, Flamed, Sandblasted, Natural split, Brushed, Machine cut |
| Standard sizes | 100 × 200 mm · 150 × 150 mm · 200 × 400 mm · 300 × 300 mm · 300 × 600 mm · 400 × 800 mm · 600 × 600 mm · 600 × 1200 mm · Cut to size |
| Thickness | 15 mm · 20 mm · 30 mm · 40 mm · 50 mm · Custom to project |
| Applications | Paving, Wall cladding, Facades, Pool coping, Stair treads, Landscape, Commercial flooring, Driveways |
| Packaging | Bundled with foam separators and edge protection, crated on edge in fumigated wooden crates, strapped and palletised. Paving above 30 mm ships on heavy-duty pallets with plywood capping. |
| Minimum order | 1 × 20ft container |
Technical Information
Andesite 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 | Andesite (volcanic, intermediate) |
| Bulk density | 2,500 – 2,750 kg/m³ |
| Water absorption | 1.5 – 4 % |
| Compressive strength | 90 – 140 MPa |
| Flexural strength | 10 – 18 MPa |
| Slip resistance | R11 – R12 bush hammered / flamed |
| Abrasion resistance | High — rated for vehicular paving at 50 mm |
| Frost resistance | Good; suitable for most temperate climates |
Gallery
Andesite Stone in use
Products
Produced in Andesite 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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Linear Stone Mosaic
Stone bars aligned in a true stack bond with continuous vertical and horizontal joints — the most disciplined mosaic pattern, for precise contemporary work.
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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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Herringbone Stone Mosaic
Rectangular stone bars set at 90° in a classic herringbone, mesh-mounted so the pattern lands accurately without site setting-out.
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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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Applications
Where Andesite Stone is specified
Questions
Andesite Stone — FAQ
Andesite for a lighter grey that stays cooler underfoot and shows less contrast when wet; basalt where the design calls for a near-black surface. Both perform outdoors; the decision is usually aesthetic and thermal rather than technical.
50 mm on a compacted, bedded base for passenger vehicles. For service or delivery access, send the axle loading and we will specify with the quotation.
Yes. Calibrated tiles hold a consistent thickness tolerance suitable for thin-bed adhesive installation, which is what most international tilers expect. Specify "calibrated" on your enquiry.
Request a Quotation
Request a quotation for Andesite Stone
Send product, finish, size, quantity and destination port for an FOB, CFR or CIF quotation.