Which material—stone, granite, marble, or concrete—lasts longest in outdoor armchairs?

When choosing outdoor armchairs, durability is a top priority. Among stone, granite, marble, and concrete, granite stands out as the longest-lasting material due to its exceptional hardness and resistance to weathering. Stone is also durable but may require more maintenance. Marble, while elegant, is more prone to staining and erosion over time. Concrete is sturdy but can crack in extreme temperatures. For longevity and minimal upkeep, granite is the best choice for outdoor armchairs, followed by stone and concrete, with marble being better suited for protected environments.