FieldSTONE- Montana Moss Boulders Montana Moss Boulders are rounded, rustic-looking edges, textured from eons of exposure to wind and water. Montana Moss rock is uniquely Western in its appearance. From large, lichen-encrusted boulders to small field cobbles, this rock makes a definite statement wherever it is used. The colors are predominantly gray, beige and brown with natural green lichen covering most surfaces. This is a popular stone for masonry veneers, landscaping and water features. AVAILABLE SIZES DESCRIPTION SIZE COVERAGE AREA Landscape Boulders Random sizes up to 10,000 lbs