Steel Gray Basalt Gravel is a clean, angular crushed hard-rock featuring a modern steel-gray tone that complements both residential and commercial landscapes. Its durable composition and consistent color make it ideal for driveways, pathways, decorative ground cover, and drainage applications. Sourced locally in Northern California, this gravel offers excellent compaction properties and long-lasting color stability, even in high-traffic or sun-exposed areas.
 
Size Guide & Common Applications
▪ Path Fines (¼” Minus)
A compactable crushed gravel mix with fine particles for smooth, stable surfaces.
Best for: Walkways, garden paths, patio bases, and decorative ground cover in low-traffic areas.
Features: Forms a firm, natural-looking surface once compacted; allows light drainage.
 
▪ 5/16” Gravel
Small angular stone providing excellent texture and compaction balance.
Best for: Decorative ground cover, pathways, permeable pavers, and transition borders around planters or stepping stones.
Features: Clean finish; ideal for blending with pavers or flagstone joints.
 
▪ 3/8” Gravel (popular size)
Versatile medium size ideal for both functional and decorative use.
Best for: Pathways, walkways, residential driveways, French drains, and edging around hardscapes.
Features: Tight compaction yet permeable; consistent gray tone for modern landscapes.
 
▪ 1/2” Gravel
A practical balance between drainage and compaction performance.
Best for: Driveways, RV pads, light vehicle parking areas, and paver base layers.
Features: Angular shape locks together well for stability; smooth underfoot finish.
 
▪ 3/4” Gravel (popular size)
Standard construction-grade crushed rock used in a wide variety of landscape and drainage projects.
Best for: Driveways, drainage swales, utility trenches, and general base rock applications.
Features: Excellent load-bearing capacity; blends naturally with concrete and paver sub-bases.
 
▪ 1-1/2” Gravel
Coarse crushed rock with superior drainage and erosion control properties.
Best for: French drains, dry creek beds, backfill behind retaining walls, and slope stabilization.
Features: Maximum drainage flow; resists movement in high-water or heavy runoff areas.
 
Material Specs & Technical Notes
Material Type: Crushed Gravel
Color Tone: Steel Gray / Charcoal Gray
Available Sizes:
Path Fines (¼” minus)
5/16” (minimum order 10 yards)
3/8”
1/2” (minimum order 10 yards)
3/4” (minimum order 10 yards)
1-1/2” (minimum order 10 yards)
Texture: Angular, fractured rock with compactable fines in smaller grades.
Composition: Crushed basalt hard-rock — highly durable, non-reactive, and colorfast.
Weight: ≈1.35–1.45 tons per cubic yard
Packaging: Bulk, sold by the cubic yard or ton (varies by location)
 
Technical Notes:
Compactable in fines gradations; angular structure provides excellent load-bearing stability.
Naturally drains when installed over compacted subgrade.
Low-maintenance; occasional raking restores uniform surface.
Meets general ASTM C33 and Caltrans Section 68 standards for crushed aggregate.
Gray tone may darken slightly when wet or sealed.
 
Service Type: Bulk Material Dump Delivery (no pickup available)
North Bay Materials offers fast, local dump truck delivery of Steel Gray Gravel throughout Marin, Sonoma, Napa, Solano, Alameda, Contra Costa and Solano counties.
All materials are delivered directly to your home, job site, or commercial property using small, driveway-safe dump trucks ideal for tight access locations.
Delivery Rates:
Starting at $95/hour round-trip, including loading and unloading time
Final delivery cost based on distance, material weight, and accessibility
Quotes confirmed prior to order completion
Truck Capacity:
Up to 18 cubic yards per load for heavy materials like gravel and rock
One material type per load (mixing multiple materials not permitted)
Placement:
Our driver will dump in your designated area — typically a driveway, flat yard, or project site with safe access and sufficient clearance. Please ensure the area is free of vehicles, debris, and overhead obstructions before delivery.
Service Areas:
We deliver to Piedmont, Dublin, San Ramon, Walnut Creek, Concord, San Rafael, Novato, Mill Valley, Petaluma, Santa Rosa, Sonoma, Napa, St. Helena, American Canyon, Fairfield, Vacaville, Benicia, and surrounding North Bay areas.
Important Notes:
Deliveries are weather-dependent; rain may delay orders.
Customer assumes responsibility for any surface marks or indentations from dump trucks.
Discounts: Truck-load (wholesale pricing) available upon request.
 
 
Frequently Asked Questions – Steel Gray Basalt Gravel
Q1. What size Steel Gray Gravel should I choose for my project?
That depends on your application:
Path Fines (¼” minus) – best for smooth, compacted pathways or patio surfaces.
3/8” or ½” – ideal for driveways, light vehicle use, and decorative landscape.
¾” or 1½” – preferred for general landscaping, drainage, erosion control, and heavy-duty driveways.
 
Q2. How much area does one cubic yard of gravel cover?
Coverage varies by depth, but on average:
2” deep: ~150 sq. ft. per cubic yard
3” deep: ~100 sq. ft. per cubic yard
4” deep: ~75 sq. ft. per cubic yard
For accurate planning, use our Material Volume Calculator on the website.
 
Q3. Does Steel Gray Basalt Gray Gravel compact well?
Yes — smaller sizes and path fines compact tightly, forming a stable surface suitable for walking or light vehicle use. Larger sizes (¾” and up) remain loose for superior drainage.
 
Q4. Will the color fade over time?
No. Steel Gray Basalt Gravel is composed of natural basalt that retain their dark gray tone indefinitely. Color may appear slightly darker when wet or freshly washed.