The evaluation of mineral resources is done by the definition of the quantity and quality of an ore located in a certain area and the logistics to deliver it to the ports and other means of transportation. The quality and quantity are classified, according to the increase of confidence in the knowledge about the local geology in: inferred, indicated and measured.

This confidence about the size of the ore deposit can be obtained through several research activities, carried out by qualified professionals. As an example of these activities we have the detailed geological mapping, the acquisition of terrestrial geophysical data, drilling campaigns and chemical analyzes campaigns.

With the integration of these data, it is possible to develop three-dimensional geological models, using appropriate software, allowing to define the shape and volume of the analyzed ore body and also to perform reverse calculations, evaluating whether the deposit in question is economically viable.