Decomposed Granite vs Lava Rock
Side-by-side comparison of Decomposed Granite and Lava Rock to help you choose the right gravel for your project.
Overview
Granite that has weathered to the point of breaking into small pieces and fine particles. Creates a natural, rustic look that blends beautifully with desert and Mediterranean landscapes. When compacted, it forms a firm yet permeable surface.
Lava rock is a lightweight, porous volcanic stone commonly used in landscaping. Its rough texture helps retain moisture while allowing airflow to plant roots.
Common Uses
Decomposed Granite
- ✓ Patios
- ✓ Pathways
- ✓ Driveways
- ✓ Xeriscaping
- ✓ Ground cover
- ✓ Bocce courts
Lava Rock
- ✓ Landscaping
- ✓ Garden beds
- ✓ Decorative ground cover
Pros & Cons
Decomposed Granite
- + Compacts into a firm walking surface
- + Natural, rustic appearance
- + Permeable — allows water infiltration
- + Low cost
- + Ideal for drought-tolerant landscaping
- − Can get muddy in heavy rain
- − Tracked indoors on shoes
- − Decomposes further over time and needs replenishing
- − Limited color options
- − Not suitable for high-traffic vehicle areas
Lava Rock
- + Very lightweight
- + Excellent moisture retention
- + Decorative appearance
- − Breaks down over time
- − Sharp edges
- − Can scatter easily
Cost Comparison
| Measure | Decomposed Granite | Lava Rock |
|---|---|---|
| Per ton | $25 – $45 | $90 – $150 |
| Per cubic yard | $30 – $50 | $110 – $180 |
Sizes & Colors
Decomposed Granite
Decomposed granite is a mix of fine particles and small chunks, typically 1/4" and smaller. Colors include gold, tan, brown, gray, and reddish-brown depending on the granite source. Stabilized DG (with resin binder) creates an even firmer surface.
Lava Rock
Typically 3/4"–1.5" sizes. Red or black.
Published February 11, 2026
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