Yes, Brazils Jade Quartzite can be used for exterior applications in very sunny climates. Quartzite is a hard and durable natural stone that is resistant to weathering and can withstand harsh environmental conditions, including exposure to sunlight.

However, it is important to note that prolonged sunlight exposure can cause color fading and discoloration in natural stone materials over time. Therefore, regular cleaning and maintenance, as well as the application of a protective sealer, are recommended to preserve the stones appearance and ensure its longevity in sunny climates.

Additionally, it is always advised to consult with a professional stone supplier or installer who can provide specific recommendations and guidance based on the local climate conditions and the specific project requirements.