I do not have access to the specific technical details of Omans Desert Sunset Limestone. However, in general, limestone is a common building material for outdoor applications as it is natural and durable. However, its porous nature makes it susceptible to weathering and staining over time. In very sunny climates, it is important to choose a limestone with a high level of resistance to UV radiation to prevent color fading. It is also important to properly seal the limestone to prevent water damage and staining. It is recommended to consult with a professional for specific recommendations on whether Omans Desert Sunset Limestone is suitable for your intended outdoor application in a very sunny climate.