River Rock

Decorative rock is any stone you spread on the ground to look good, not to hold weight.

Lava rock is chunks of cooled volcanic rock, usually red, black, or brown.

Decomposed granite is granite rock that's broken down into small bits over a long time.

#57 stone is crushed rock screened between about 1 inch and 1/4 inch, with the fines washed out.

Boulders are large stones, usually bigger than 10 inches across, used as accents in a yard or to hold back a slope.

Chip stone is small, angular rock made by crushing a bigger stone and screening out the dust.

Cobbles are large rounded rocks, roughly 2.5 to 10 inches across.

#4 stone is crushed rock sized roughly 1 1/2 inches to 2 1/2 inches across.

#7 stone is crushed rock screened so most pieces fall between about 1/2 inch and 1/4 inch.

#89 stone is small crushed rock, roughly 3/8 inch down to about 1/8 inch.

Small tumbled stones about the size of a pea, usually 1/8 to 3/8 inch, that got rounded smooth by rivers or streams instead of run throug…