RUIVINA ESCURA MARBLERuivina Escura Marble is a grey hue. It is from Portugal. Ruivina Escura Marble is suited for both indoor and outdoor use. Natural factors such as snow, rain, wind, and pollution can all have an impact on the beauty and dependability of natural stone. The real marble stone is preferred over engineered stone because the unique pattern and subtle shading for the marble look are not precisely duplicated by man made slabs.