Profile: Alpine Materials, LLC specializes in landscape materials and recycling. Our products include mulches, compost & soil, natural stone, sand & aggregates, and bagged concrete & masonry. Some of our natural stones are Aztec gravel, salt & pepper cobbles, Colorado cobbles, and Arizona cobbles. The salt & pepper cobbles are smooth with shapes from round to egg shaped. They are available in colors from light white to dark gray, with sizes from 2" to 4", 4" to 8", and 8" to 12". The Aztec gravel is mainly pink in color, and is approximately 1" in size.