I dont have access to detailed information about Indias Ocean Black Phyllite, but generally, phyllite is a type of metamorphic rock that is suitable for surfaces such as countertops, flooring, and tiles in indoor settings. However, its use outdoors may depend on several factors such as the climate, exposure to sunlight, moisture, and the level of foot traffic it will endure. It is important to consult with a professional to determine if the specific type of phyllite is suitable for outdoor use and to ensure that it is properly sealed or treated for durability.