When selecting a sphere fountain, material choice directly impacts longevity and maintenance. Natural Stone (Granite, Marble, Basalt) is the premium choice for durability and weather resistance, especially in cold climates. Stainless Steel (Grade 304 or 316) offers a modern aesthetic and is highly resistant to corrosion, making it ideal for coastal areas. For budget-conscious projects, Fiberglass or Polyresin provides a lightweight, easy-to-install alternative, though they may require UV-resistant coatings to prevent fading.