Yes, New Zealands Alexandra Brown Schist can be used in a bathroom. Schist is a durable and water-resistant metamorphic rock that is commonly used in various construction applications, including bathroom materials. This natural stone can be used for wall cladding, flooring, countertops, shower areas, and other decorative elements in a bathroom. It can add a unique and elegant look to the space while providing a practical and durable surface. However, it is important to ensure that the schist is properly sealed and maintained to prevent water damage and staining.