Selecting the appropriate material is critical for durability. For wet areas like swimming pools or bathrooms, prioritize Glass or Glazed Ceramic mosaics due to their zero water absorption rate and resistance to chemicals. For high-traffic floor borders, choose Natural Stone (Marble/Granite) or Porcelain, which offer superior abrasion resistance (PEI Rating 3 or higher). If the project is for kitchen backsplashes, ensure the material is heat-resistant and easy to clean, such as polished glass or stainless steel composites.