Yes, Austrias Aflenz Limestone can be used outdoors. It is a durable and weather-resistant limestone that can withstand outdoor conditions such as sunlight, rain, and temperature changes. It is often used for exterior cladding, paving, and landscaping applications due to its attractive appearance and ability to withstand outdoor elements. However, it is always recommended to consult with a local expert or supplier for specific guidance on the suitability and maintenance of Aflenz Limestone for your intended outdoor use.