Lava Rock vs River Rock
Side-by-side comparison of Lava Rock and River Rock to help you choose the right gravel for your project.
Overview
Lava rock is a lightweight, porous volcanic stone commonly used in landscaping. Its rough texture helps retain moisture while allowing airflow to plant roots.
Naturally rounded stones smoothed by water erosion. Available in sizes from 1 to 5+ inches. River rock adds a polished, natural look to any landscape and is prized for its smooth texture and visual appeal.
Common Uses
Lava Rock
- ✓ Landscaping
- ✓ Garden beds
- ✓ Decorative ground cover
River Rock
- ✓ Landscaping
- ✓ Dry creek beds
- ✓ Drainage
- ✓ Decorative borders
- ✓ Erosion control
- ✓ Pond and water features
Pros & Cons
Lava Rock
- + Very lightweight
- + Excellent moisture retention
- + Decorative appearance
- − Breaks down over time
- − Sharp edges
- − Can scatter easily
River Rock
- + Beautiful, natural appearance
- + Extremely durable and long-lasting
- + Heavy enough to resist displacement
- + No sharp edges
- + Low maintenance
- − More expensive than crushed stone
- − Heavy and difficult to move
- − Not suitable for walking surfaces
- − Cannot be compacted
- − Limited use for structural applications
Cost Comparison
| Measure | Lava Rock | River Rock |
|---|---|---|
| Per ton | $90 – $150 | $40 – $100 |
| Per cubic yard | $110 – $180 | $45 – $120 |
Sizes & Colors
Lava Rock
Typically 3/4"–1.5" sizes. Red or black.
River Rock
River rock comes in a wide range of sizes: small (1"–2"), medium (2"–3"), large (3"–5"), and boulders (5"+). Natural colors include gray, brown, tan, white, black, and multi-colored blends. Mexican beach pebbles offer polished black and gray options.
Published February 11, 2026
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