Argillite boulders are large, natural rock formations that are often used in landscaping and hardscaping projects. They are typically gray or black in color and have smooth, polished surfaces. Argillite is a sedimentary rock made of clay-rich particles that have been compacted and cemented together over time. It is a hard and durable rock that is resistant to weathering and erosion. Boulders made of Argillite can be used as a decorative feature in gardens, around water features, or as an accent in rock gardens. They can also be used to create retaining walls, steps, or borders in hardscaping projects. Because of their natural beauty and durability, Argillite boulders are a popular choice for both residential and commercial landscaping and hardscaping projects.