The coefficient of friction of Chiseled Frances Angers Slate tiles depends on various factors such as the surface finish, moisture content, and the presence of any additional treatments or sealants. Therefore, without specific information about these factors, it is not possible to provide an accurate value for the coefficient of friction of this particular type of slate tiles. It is recommended to check with the manufacturer or supplier for the most accurate and up-to-date information regarding the coefficient of friction of these tiles.