bluestone
Description
Bluestone, also known as Hainan black basalt, is a striking volcanic basalt quarried from Hainan Island, China. Renowned for its deep, rich black hue and fine-grained texture, this natural stone is highly valued for its durability and aesthetic appeal. Its volcanic origins give it unique density and strength, making it ideal for both indoor and outdoor applications, including countertops, flooring, and wall cladding. Hainan Black’s sleek, modern appearance pairs well with various design styles, from contemporary to traditional. Its resistance to weathering and wear ensures longevity, while its polished finish adds a touch of elegance to any space. A premium choice for architects and designers worldwide.
Bluestone Quarry
The bluestone quarry on Hainan Island is a striking example of basalt formation, showcasing vertical columns with a spectrum of colors—brown, orange, and gray. These hues suggest mineral diversity or weathering effects. The quarry’s base, littered with broken rocks and red soil rich in iron oxide, highlights the site’s geological history. Located in a tropical climate, the quarry’s structure, with typical hexagonal basalt joints, illustrates the region’s volcanic heritage. This site is not only a geological wonder but also a significant source of construction materials, reflecting Hainan’s rich natural resources.
Finishing Options
Bluestone Technical Specifications
| Property | ASTM Standard | Unit (Imperial) | Unit (Metric) |
|---|---|---|---|
| Compressive Strength | ASTM C170 | 15,000 - 20,000 psi | 100 - 138 MPa |
| Flexural Strength | ASTM C880 | 2,000 - 4,000 psi | 14 - 28 MPa |
| Water Absorption | ASTM C97 | < 1% | < 1% |
| Density | ASTM C146 | 175 - 185 lb/ft³ | 2,800 - 2,950 kg/m³ |
| Thermal Conductivity | ASTM C518 | 10 - 15 Btu·in/(hr·ft²·°F) | 1.5 - 2.5 W/(m·K) |
| Abrasion Resistance | ASTM C241 | 5 - 10% | 5 - 10% |
| Freeze-Thaw Resistance | ASTM C666 | 1 - 2% Loss | 1 - 2% Loss |
| Modulus of Elasticity | ASTM C593 | 50,000 - 60,000 psi | 34.5 - 41.4 MPa |
| Chemical Resistance | - | Resistant | Resistant |
| Coefficient of Thermal Expansion | ASTM C531 | 0.000008 - 0.000015 in./in./°F | 5 - 10 µm/m/°C |
