Crushed StonesArmour Stone / Cropping Stone
Armour Stone and Cropping Stone are large, naturally shaped limestone boulders built for retaining walls, erosion control, flood prevention, and bold landscaping statements. Raw strength meets natural beauty.
Armour Stone, also known as Cropping Stone and commonly referred to as Rip Rap, Shot Rock, Boulders, or Slope Rock, is a large-format, naturally shaped limestone used where both structural integrity and visual impact are required. Each piece is a substantial, irregular-shaped stone that brings raw, natural character to any application it's used in.
Structurally, Armour Stone is one of the most effective materials available for retaining walls, leveraging its sheer mass and natural friction to hold back soil and resist the forces of erosion, water, and gravity without the need for mortar or mechanical fasteners. Along slopes, embankments, and waterways, it provides a formidable barrier against erosion and flood damage, protecting land and infrastructure through brute strength and natural durability. Its large, flat faces also make it a popular choice for crafting natural stone steps in landscaping and outdoor living spaces.
Beyond function, Armour Stone's bold, rugged appearance makes it a striking design element in landscape and hardscape projects, lending a natural, timeless aesthetic to gardens, water features, property borders, and decorative installations.
Common Uses: Retaining walls, erosion control, flood prevention, steps, and landscaping.
Technical Specifications
- Particle Size
- Large format — irregular natural shape
- Bulk Density
- 100 – 115 lbs/ft³ (1,600 – 1,840 kg/m³)
- Specific Gravity
- 2.60 – 2.70
- Water Absorption
- 0.5% – 2.0%
- Los Angeles Abrasion Loss
- ≤ 45% (ASTM C131)
