Marching Ants Basalt

About
Item Details
- Material Type:
- Basalt
- Origin:
China (Hainan) - Recommended Usage:
- monuments, building stone, ornamental stone, stairs, interior, exterior wall and floor applications, mosaic, waterjet pattern, wall panels, table tops, window sills, balustrades, columns, wall and pool copings, pool pavers, sculptures, fireplaces, pavers, cobbles, curbstone
- Additional Names:
- Ant Line Basalt, Marching Ants Lava Stone, Hainan Black Basalt, Hainan Black Lava Stone, Hainan Black Lavastone, Hainan Black Travertine, Haikou Basalt, Haikou Black Basalt, in China stone market:海南黑色玄武岩(Hǎinán Hēisè Xuánwǔyán), 海南黑玄武岩(Hǎinán Hēi Xuánwǔyán), 蚂蚁线 (Mǎ Yǐ Xiàn), Marching Ants Basalt
- Finished Surface:
- Polished,Flamed,Bush Hammered,Tumbled,Brushed,Honed,Split,Machine Cut,Natural Surface,Sandblasted,Acid Washing,Combed,Leathered,Water Jet,Chiseled,Pickling
Testing
- Water Absorption:
- 1.91 %
- Density:
- 2407 kg/m³
- Flexural Strength:
- 11.09 MPa
- Compressive Strength:
- 48.92 MPa
Description
Marching Ants Basalt features a deep matte greyish-black to charcoal base with subtle earthy undertones. Its dark, understated color and rugged surface create a distinctive natural appearance suitable for contemporary, rustic, and landscape-oriented architectural designs.
Texture & Structure:
The stone has a naturally porous, vesicular texture formed by gas cavities during volcanic cooling. Numerous irregular voids and cavities of varying sizes are distributed across the surface, creating a rough, rugged, and organic character. Unlike polished decorative stones, its appeal comes primarily from its natural surface texture. The pore depth, size, and distribution may vary between pieces.
Pattern & Surface Characteristics:
Marching Ants Basalt lacks conventional mineral veining. Instead, its surface is defined by densely scattered, crater-like pores and cavities that create a rhythmic, textured pattern reminiscent of marching ants. The irregular openings and subtle tonal variations give the stone a distinctive visual depth. Its natural appearance is particularly effective in applications where texture and material authenticity are desired.
Technical Characteristics:
- Water Absorption: 1.91% by weight
- Density: 2407 kg/m³
- Flexural Strength: 11.09 MPa
- Compressive Strength: 48.92 MPa
- Hardness: Approximately 5–6 Mohs, indicative
- Surface Texture: Naturally porous and vesicular
Mineral Composition (% by weight):
- Plagioclase Feldspar: 35–55%
- Pyroxene: 20–40%
- Olivine: 0–15%
- Volcanic Glass and Fine-Grained Matrix: 0–15%
- Iron Oxides and Accessory Minerals: 1–5%
Chemical Composition (% by weight):
- SiO₂: 45–52%
- Al₂O₃: 12–17%
- Fe₂O₃ and FeO: 8–15%
- CaO: 7–12%
- MgO: 4–10%
- Na₂O: 2–4%
- K₂O: 0.5–2%
- TiO₂: 0.5–2%
- Other Oxides: Trace amounts
Usage:
Suitable for landscape paving, garden pathways, outdoor patios, courtyard flooring, decorative wall cladding, feature walls, garden edging, water-feature surrounds, and selected architectural landscaping applications. Its naturally porous texture provides a rugged aesthetic, but suitability for wet areas, heavy pedestrian traffic, and freeze-thaw environments should be assessed according to the intended installation. Deep cavities may collect dirt and require more frequent cleaning, while water-sensitive installations may require appropriate sealing or surface treatment.
Finishes:
Natural, sawn, honed, brushed, flamed, and other custom finishes, subject to the stone's characteristics and processing suitability. Finishing may alter the appearance and openness of the natural cavities.
Maintenance:
Clean with water and a suitable pH-neutral stone cleaner using a soft brush to remove dirt from the cavities. Avoid acidic cleaners, harsh chemicals, and abrasive methods that may damage the surface or leave residues. Depending on the application and porosity, a compatible penetrating sealer may help reduce water and stain absorption, although it will not eliminate the natural cavities. For outdoor installations, provide proper drainage and remove accumulated dirt, leaves, and standing water regularly. Confirm sealer compatibility on a sample before treating the entire surface.
Note: The supplied water absorption, density, flexural strength, and compressive strength values are provided as stated. Hardness and mineral and chemical compositions are indicative estimates for database reference, not verified laboratory results for this specific stone. Actual properties may vary between quarry lots and should be confirmed through appropriate testing.





















