Curupau or Patagonian Rosewood is the hardest wood sold as flooring and hails from 100% FSC forests in Bolivia. Also known as Curupay, Curupau, Angico Preto, our Patagonian Rosewood is gorgeous elegant cinnamon-brown wood with some dark streaking character is a top choice for anyone looking for a medium to darker tone wood floor. Curupau also has astonishing durability with a Janka hardness rating of 3,840, making it particularly resilient to wear, tear and impacts. ELEMENTAL prefinished Curupau is predarkened which means this highly photosensitive wood will come out of the box in the color it naturally darkens to with age, thereby saving the homeowner from the work of moving furniture and space rugs as the floor ages and darkens with time.