Yes, Brazils Athena Quartzite can be used in exterior applications in very rainy climates. Quartzite is a highly durable and weather-resistant natural stone that is resistant to water absorption, making it suitable for outdoor use. It can withstand rain, humidity, UV rays, and other environmental factors, making it an excellent choice for areas with a very rainy climate. However, proper sealing and regular maintenance are still recommended to ensure the longevity and appearance of the stone in such conditions.