Yes, United Statess Black Pearl Schist can be used for exterior applications in hot climates. Schist is a type of metamorphic rock known for its durability and resistance to weathering. It has been widely used in various construction applications, including exterior cladding, paving, and landscaping. Schists properties make it suitable for hot climates as it can withstand high temperatures without significant damage or deterioration. However, its always recommended to consult with a professional stone supplier or architect to ensure proper installation and maintenance guidelines specific to the local climate conditions.