Crushed rock and gravel are the workhorses of a landscape. The short answer on what they do: angular crushed rock with rock fines packs down into a firm, stable surface, which makes it ideal for driveways, paths, and the base layer under pavers, while cleaner gravels shed water and dress up beds. Here is what these materials are, where each one fits, and how they compare to decomposed granite.
What crushed rock and gravel are
Crushed rock is stone that has been mechanically broken, so the pieces are angular with sharp edges. Many crushed products include rock fines, the powdery and sandy particles left over from crushing. Those fines fill the gaps between the larger pieces, and when you compact the material the whole layer locks together into a firm surface. Cleaner gravels with the fines screened out stay loose and drain fast instead.
The angular shape is the key difference from smooth river rock. Angular edges grip each other, so the material holds its shape under foot and tire traffic. Rounded stone rolls and shifts.
Where to use crushed rock and gravel
- Driveways that need a firm, rut-resistant surface for vehicles.
- Paths and walkways where you want a stable, natural-looking tread.
- Base layer under pavers, flagstone, and retaining walls.
- Ground cover in beds and side yards that get little traffic.
- Drainage using clean, fines-free gravel in trenches and around pipe.
For a path that stays firm, see our notes on the best landscape rock for pathways. Building a seating or dining area? Our guide to the best landscape rock for a patio covers what compacts well underfoot.
Why fines make rock compact firm
A pile of same-size stone has large voids between every piece, so it never fully locks together. Add fines and those voids fill in. Wet the material, run a plate compactor over it, and the fines bind the larger aggregate into a dense layer that drains slower but holds firm. That is exactly what you want under a paver patio or on a driveway. For a loose, fast-draining bed, you want the opposite: a clean gravel with the fines removed.
Crushed rock vs decomposed granite
Both can pack down firm, but they feel and look different. Decomposed granite is a granite-based material that weathers down to a finer, sandier blend with a warm gold-to-brown tone. Crushed rock is sharper and comes in many stone types and grays.
| Factor | Crushed rock and gravel | Decomposed granite |
|---|---|---|
| Shape | Angular, sharp edges | Finer, sandy with small grit |
| Surface feel | Firmer, coarser tread | Smoother, softer underfoot |
| Best use | Driveways, base, paths | Patios, garden paths, decorative |
| Look | Many colors, often gray | Warm gold to brown |
Compare colors and grades in our decomposed granite before you choose.
Order a sample first
Stone color reads differently in a yard than on a screen. Order a sample so you can set it next to your house, paving, and plants before committing to a ton or a truckload. It is the cheapest insurance against a color you do not love.
Frequently asked questions
What is the difference between crushed rock and gravel?
Crushed rock is mechanically broken stone with angular edges, often sold with rock fines that help it compact firm. Gravel is a broader term that can be rounded or crushed and is sometimes screened clean of fines for faster drainage.
Does crushed rock compact?
Yes, when it includes fines. The fines fill the gaps between larger pieces, and compacting with water and a plate compactor binds the layer into a firm, stable surface. Clean gravel without fines stays loose.
What is the best gravel for a driveway?
A crushed product with fines, often a base rock or road base blend, compacts into a firm driveway surface that resists ruts. Browse our base and ground materials for the right grade.
How much crushed rock do I need?
It depends on the area and depth. Driveways and base layers usually run 3 to 4 inches or more. Use our coverage calculator to get a quantity in tons or bulk.
Get the materials
Browse our base and ground materials for driveway and base rock, pea gravel for a softer decorative look, and decomposed granite for paths and patios. Size your job with the coverage calculator. We deliver nationwide from our California yards.