Castle Rock stone comes from our highest mountain top quarry. Castle Rock is primarily grey, with chocolate brown, and light tan tones that display the ruggedness of Northwest Montana. ***Limited Availability – High Elevation Quarry***

Stone Thickness & Size Range

Thickness: 3-5″
Face Values: 2-8″ high x 3-18″ long

Stone Weights & Coverage

Weight per sq ft: 53 lbs
Weight per pallet: 4,000 lbs
Coverage per ton: 30-35 sq ft

Geological Stone Type: Argillite

*All weights and coverages are approximate