The coefficient of friction of Leathered Turkeys Vanilla Travertine tiles would depend on various factors such as the texture of the leathered surface, the specific finish applied to the tiles, the angle of the surface, and the presence of any contaminants.

To obtain an accurate coefficient of friction for these tiles, it is recommended to consult the manufacturer or supplier of the tiles. They should have conducted relevant tests to determine the coefficient of friction, which could differ between different finishes or variations of the product.

In general, a higher coefficient of friction indicates more traction and a lower risk of slipping. However, without specific information about the tiles in question, it is not possible to provide an exact coefficient of friction value.