Yes, Brazils Black Tremendal Quartzite can be used outdoors. Quartzite is a natural stone that is highly durable and resistant to weathering and erosion. It has a low water absorption rate, making it suitable for outdoor applications such as patios, pool decks, and driveways. However, it is always recommended to consult with a professional stone supplier or installer to ensure that the specific variety of Black Tremendal Quartzite is suitable for your intended outdoor use and to obtain any necessary sealing or maintenance instructions.