I do not have information about the specific properties of Pakistans Fortune Red Marble. However, natural marble is generally not recommended for exterior applications in very sunny climates due to its susceptibility to fading, staining, and weathering. It is porous, which makes it susceptible to water absorption and staining from substances like oil, food, and chemicals. The suns UV rays can also cause marble to fade and discolor over time. Therefore, it is advised to use a more durable and weather-resistant material such as granite or porcelain for exterior applications in sunny climates.