Yes, Brazils Adamantium Quartzite can be used for exterior applications in very dusty climates. Quartzite is a durable and hard natural stone that is resistant to scratching and weathering, making it suitable for various outdoor applications. Additionally, it does not easily absorb dust or dirt, which means that it can be easily cleaned and maintained in dusty environments. However, regular cleaning and maintenance may still be required to ensure the stones longevity and appearance.