Black Star Basalt Rock (5/8")

Black Star Basalt Rock (5/8") - Technical Overview and Practical Information

Black Star Basalt Rock (5/8"), also known as Black Basalt Rock, Black Star Gravel, Black Star Aggregate, Basalt 5/8", or Black Star Stone, is a dense, fine-grained igneous aggregate. The material is sourced from volcanic basalt formations and features a dark black to deep gray color. Each piece measures approximately 5/8 inch (about 16 mm) in diameter. The rock is angular to sub-angular in shape, providing excellent compaction and stability for a range of applications.

This stone is hard and durable, with high compressive strength and low porosity. It is resistant to weathering and abrasion, making it suitable for both decorative and structural uses. The chemical stability and pH neutrality of Black Star Basalt mean it does not react with surrounding materials. It is clean, free from organic material, and meets ASTM C33 and ASTM D448 standards for aggregate grading and quality.

Physical and Mechanical Properties

• Particle size: 5/8 inch (approx. 0.625 inch or 16 mm)
• Bulk density: ~150 lb/ft³ (varies by source)
• Compressive strength: High (exact values depend on quarry)
• Shape: Angular to sub-angular
• Porosity: Low
• Color: Dark black to deep gray (appears nearly black when wet)
• Moisture content: Typically low, but may vary with storage

Black Star Basalt Rock should not be confused with lighter-colored aggregates such as river rock or limestone gravel. Its unique mineral composition and color provide a distinctive visual contrast in landscaping and construction projects. The material is typically installed over a well-prepared base and compacted mechanically for best results.

Common Uses and Limitations

Black Star Basalt Rock (5/8") is used in a wide range of residential, commercial, and infrastructure projects. Its angular shape and stability make it a preferred choice for areas requiring strong compaction and firm surfaces. However, it is not suitable for applications where rounded or decorative pebbles are required, or where lighter colors are desired. The dark color can absorb and retain heat, which may affect nearby plants in hot climates.

• Decorative landscaping rock and mulch alternative
• Base material for pavers, patios, and walkways
• Drainage and erosion control layers
• Concrete aggregate for driveways and slabs
• Gabion filling and retaining wall backfill
• Accent for water features and pool areas
• Filler for fire pit and paver projects
• Railroad ballast and water filtration media (specialized uses)

For landscaping, the 5/8" size offers a balance between visual appeal and mechanical stability. It is small enough for comfortable walking surfaces and allows for adequate drainage. In pathways and garden beds, it suppresses weeds and helps prevent soil erosion. The dense structure and angular edges promote interlocking, which reduces movement and settling over time.

Installation and Maintenance Considerations

Proper installation is important for long-term performance. The product should be applied in layers over a graded sub-base and compacted using a plate compactor. Maintenance includes occasional replenishment to address settling or displacement, as well as removal of debris and organic material to maintain its weed-suppressing properties. Re-compaction of pathways may be needed to preserve surface firmness.

Due to its density and angularity, Black Star Basalt Rock is not recommended for applications requiring high permeability or where frequent movement is expected. It is pH neutral to slightly alkaline and does not leach harmful substances. Always consult the material safety data sheet (MSDS) or technical data sheet (TDS) for specific supplier details.

Comparison of Black Star Basalt Rock to Other Aggregates

The selection of aggregate depends on the specific requirements of your project, including durability, compaction, and appearance.

Sample Pricing for Black Star Basalt Rock (5/8") with Delivery

Pricing for Black Star Basalt Rock (5/8") varies by location due to transportation costs and local availability. Below are examples from selected cities across the United States. Each price reflects the cost per ton and the delivery fee to that area. All prices include delivery, and rates may change based on distance from the nearest quarry or yard.

To view pricing for your specific location, enter your ZIP code on our website. All listed prices include delivery and sales tax.

Ordering and Delivery Process at Gravelshop

Ordering Black Star Basalt Rock (5/8") from Gravelshop is straightforward. You can select your desired quantity, enter your ZIP code, and view the total price including delivery. Payment options include Visa, Mastercard, American Express, Discover, Diners Club, JCB, Apple Pay, Google Pay, and Cash App Pay. After placing your order, you will receive a confirmation email with delivery and payment details. Deliveries are performed by independent trucking companies, and the driver will unload the material at the most suitable location on your property. Please note that we do not provide material spreading or landscaping services.

The minimum order quantity varies by location and product availability. You can use the material calculator on our website to estimate the amount needed for your project. Delivery is available in 31 U.S. states, and all prices shown include delivery. If you are not present at the time of delivery, the material will be left unattended, and you accept responsibility for its security and placement.

Summary Table: Key Technical Specifications

Important Usage Notes and Limitations

Black Star Basalt Rock (5/8") is not intended for use where rounded aggregate is required or where a light color is preferred. The dark color can retain heat, which may impact plant health in hot environments. Not suitable for applications needing high permeability or frequent movement. Always check local specifications and consult technical data sheets for detailed guidance.

For additional questions or to place an order, visit the Gravelshop website. Delivery terms, pricing, and order minimums are available online. If you require a quote for a larger order or need a product not listed, contact us directly by phone or email.