In the large selection of natural stones for internal stairs is first of all a distinction between hard rocks, soft rocks and artificial stones.
The hard rock belongs to the first granite, with the well-known materials such as Rosa Beta, Bianco Sardo, Penalva or Pietra Salgadas.
Other well-known hard rocks are Nero Assoluto, Impala or Star Galaxy, which belong to the hard rock type Gabbro. Padang Dark, on the other hand, is a diorite. Migmatite is another type of hard rock, such as Juparana Colombo or Multi Color.
One of the best-selling hard rock stone levels today is Padang Dark - also known as G 654, and granite steps from Spanish granite Gris Nevada.
Soft rocks are essentially marble, limestone, shale and sandstone. It must be considered here that the marble staircase, stairs made of slate or sandstone stairs are much more susceptible to scratching than hard stones. Carrara and Jura Yellow are among the best known soft rocks.
Artificial stones are differentiated in Agglo, also called Agglomarmor and quartz composite.