The exploitation of the augen gneiss was Presented by the   Jean Baptiste Debret in his book 'Voyage Pittoresque et Historique au Brésil'. 

we highly recommend all hikers to enjoy rio's mountain trails accompanied by an experienced and certified hiking guide- in addition to the extra safety hiking guides can provide, professional guides are fluent in portuguese and would be indispensable in case of an emergency to communicate with rescue crews.

following, we list some tour operatorsthat specialize in taking visitors in the area - these contacts are provided as courtesy only, and visitors who intend to use these services should check for safety records and certifications of individual guides.