The density of marble rock can vary depending on its composition and impurities. However, a typical range for the density of marble is:

2.6 to 2.8 grams per cubic centimeter (g/cm³)

This is equivalent to:

* 162 to 174 pounds per cubic foot (lb/ft³)

It's important to note that this is just an average. Some marbles can be slightly denser or less dense due to variations in mineral content and porosity.