GM Granitos e Marmores has been quarrying Azul Macaubas since 1981. At first, everything was very difficult, access to the quarrying area was unstable, the extreme hardness of the stone made work difficult, and the shape of the deposit, composed of a vein of quartzite about eight metres thick embedded into a rocky cordillera, didn’t help.

The breathtaking beauty of Azul Macaubas gave the strength to go on, and nowadays the material has become a leader in the dimensional stone market.

Its rich blue colour is given by a very rare mineral, called dumortierite, which can only be found in Brazil and in few regions of South Africa, and the GM quarries are the only ones to quarry Azul Macaubas.

Through the experience gained over the years and the modern technology of its machinery, GM can currently sustain a consistent output of quality blocks, which is a prerequisite to be accepted by an increasingly demanding international market.