#4 Stone vs Mexican Beach Pebble: Size, Cost, and Which to Use

#4 Stone

Sieve size #4 in the ASTM aggregate grading means most of the stone passes a 1.5-inch screen and stays on a 3/4-inch screen. In practice you get a pile of roughly walnut to golf ball sized rock. Every piece is angular because it was crushed, and those sharp edges lock together under load instead of rolling like river stone. Because it is washed or screened clean, there are no fines to fill the gaps between pieces. That is the whole point: about 35 to 40 percent of a pile of #4 is air, so water moves through it fast.

Mexican Beach Pebble

Mexican beach pebbles are smooth, naturally tumbled stones commonly used in modern and decorative landscaping. They are prized for their uniform shape, rich color, and polished appearance.

#4 Stone

• ✓ Driveway and road base
• ✓ Drainage beds
• ✓ Retaining wall backfill
• ✓ Construction entrance pads
• ✓ Pipe bedding for large pipe
• ✓ Erosion control

Mexican Beach Pebble

• ✓ Decorative landscaping
• ✓ Garden beds
• ✓ Planters
• ✓ Water features

#4 Stone

• + Excellent drainage with 35 to 40 percent void space
• + Bridges soft ground better than smaller stone
• + Cheap, $20 to $40 per ton, and stocked everywhere
• + Angular pieces lock together under load
• + Same price as #57 with more drainage capacity

• − Too coarse to walk on or drive on as a surface
• − Needs a finer cap layer for any traffic
• − Hard to rake and spread by hand
• − Sinks into soft clay without fabric

Mexican Beach Pebble

• + Very attractive appearance
• + Smooth texture
• + Long-lasting
• + Low dust

• − Expensive
• − Poor traction
• − Can shift easily

#4 Stone

#4 stone is crushed rock screened to pieces between 1 and 1.5 inches, with some quarries running it up to 2 inches. It is angular with sharp fractured faces. Color follows the quarry: gray or blue-gray limestone in the Midwest and Northeast, gray to pink granite in the Southeast, tan limestone in Texas.

Mexican Beach Pebble

Available in sizes from 1" to 3". Commonly black, charcoal, or dark gray.