I dont have access to the specific technical details of Pakistans Black Gold Marble. However, in general, marble is not recommended for exterior applications in hot climates because it is a natural stone that can be sensitive to temperature changes and can fade or deteriorate over time under extreme weather conditions. It is better to consult with a marble expert or supplier to determine if Pakistans Black Gold Marble is suitable for outdoor installation in hot climates and the appropriate maintenance and care guidance to ensure its longevity.