Switzer's Nursery & Landscaping, Inc. It is a natural stone quarried in Northern Wisconsin. The walls and steps are Fond du Lac Limestone. Other varieties included Chilton Stone & Lannon Stone. Check your local stone yard for availability and pricing. This wall used 4-5" high of 8" wall stone - 1 ton covers approximately 20 square feet of wall surface when installed. Thanks for the question and best of luck to you!