The coefficient of friction of Water Jet Cut Mexicos Nube Coral Stone tiles can vary depending on various factors such as the surface finish of the tiles, the presence of any additional coatings or sealants, and the specific testing method used to determine the coefficient of friction. A direct answer to this question would require specific testing data from the manufacturer or a reliable source. It is recommended to contact Water Jet Cut Mexico or refer to their product specifications for accurate and up-to-date information regarding the coefficient of friction of their Nube Coral Stone tiles.