What are the best stone types for outdoor sofas in areas prone to landslides?

When selecting stone for outdoor sofas in areas prone to landslides, durability and stability are key. The best stone types include granite, basalt, and slate, known for their strength and resistance to weathering. Granite is highly durable and can withstand heavy pressure, making it ideal for unstable terrains. Basalt offers excellent density and resistance to erosion, while slate provides a sleek, slip-resistant surface. These materials ensure longevity and safety, even in challenging environments. Opt for natural, untreated stones to maintain their structural integrity and aesthetic appeal over time.