Crushed Stone
We deliver every gradeTrap Rock
Trap rock is crushed stone made from dark, dense igneous rock like basalt, diabase, or gabbro. It's quarried from old lava flows and hardened magma that cooled underground. The pieces are hard and angular, so they lock together under weight and hold up well to freeze-thaw and heavy traffic.
Trap rock isn't one specific rock. It's a quarry term for dark, fine-grained igneous stone that breaks with a step-like fracture. The name comes from the Swedish word for stairs, trappa. A yard of crushed trap rock weighs about 1.55 tons, which is heavier than limestone, so trucking and per-ton pricing usually run a little higher.
Compare every grade
| Grade | Size | Shape | Washed | Top use | We deliver |
|---|---|---|---|---|---|
| Trap Rock (2″) | 2" | Angular | — | Landscaping | We deliver it |
| Trap Rock (3″ To 6″) | 3" To 6" | Angular | — | Erosion control | We deliver it |
What people use it for
How to choose within trap rock
Compaction over drainage
Angular pieces lock together. Pick a smaller size when you need the surface to stay put under a driveway or path.
Drainage over compaction
The larger the piece, the more room for water to move through. #1 or #57 for a French drain; #8 or smaller reads as loose gravel.
Washed vs. unwashed
Washed has the dust rinsed out, so it drains faster and won't track into the house. Unwashed compacts harder — better under a paver base.
Other crushed stone families
Chip Stone
We deliverChip stone is small crushed rock, roughly 1/4 inch to 1/2 inch across, with the dust screened out.
57 Stone
We deliver#57 stone is crushed rock screened between about 1 inch and 1/4 inch, with the dust washed out.
4 Stone
We deliver#4 stone is crushed rock screened between about 1 1/2 inches and 3/4 inch.
8 Stone
We deliver#8 stone is crushed rock screened between about 3/8 inch and 1/8 inch, with the fines washed out.
67 Stone
We deliver#67 stone is crushed rock screened between about 3/4 inch and 1/4 inch, with most of the dust washed out.
Crushed Stone 3 Stone
We deliver#3 stone is crushed rock in pieces roughly 1 to 2 inches across.
10 Stone
We deliver#10 stone is crushed rock screened down to dust and small pieces smaller than about 3/8 inch.
1 Stone
We deliver#1 stone is large crushed rock, roughly 2 to 4 inches across.
89 Stone
We deliver#89 stone is crushed rock screened between about 3/8 inch and the size of a coarse sand grain.
9 Stone
We deliver#9 stone is crushed rock screened to a 3/8 inch top size, with pieces running down to about the size of a grain of rice.
5 Stone
We deliver#5 stone is crushed rock screened between about 1 inch and 1/2 inch, with the fines washed out.
Crushed Stone 2 Stone
We deliver#2 stone is crushed rock screened between about 2 1/2 inches and 1 1/2 inches, with the dust washed out.