The selective extraction of quartz from pegmatitic bodies is used in several markets. Company in the process of implantation in Rio Grande do Norte aims to produce quartz for export with the objective of reaching the European market of silestones. This is used in civil construction in several applications, from sinks, benches, among others. The quartz was submitted to comminution process in a crushing plant with products in the specified granulometry. Due to the great abrasion of the quartz, it is generated contaminants coming from the processes of comminution. This work was carried out from a sample of 150 kg, which were submitted to processes similar to those carried out by the industry, in order to quantify and characterize the contaminants. These were characterized, the composition of the contaminating species being identified by mineralogical analysis (DR-X). The samples were classified by mesh in order to verify the concentration of the contaminant, as well as the identification of the best conditions for its separation in a high field magnetic separator. The extraction process was compatible with market demand.A extra??o seletiva de quartzo proveniente de corpos pegmat?ticos ? empregada para diversos mercados. Empresa em processo de implanta??o no Rio Grande do Norte objetiva produzir quartzo para exporta??o com o objetivo de atingir o mercado europeu de silestones. Este ? utilizado na constru??o civil em diversas aplica??es, desde pias, bancadas, entre outros. O quartzo ? submetido a processo de cominui??o em planta de britagem com produtos nas granulometrias especificadas. Devido a grande abras?o do quartzo, ? gerado contaminantes oriundo dos processos de cominui??o. Este trabalho foi realizado a partir de amostra de 150 kg, as quais foram submetidos a processos similares aos realizados pela ind?stria, visando quantificar e caracterizar os contaminantes. Estes foram caracterizado, sendo a composi??o da esp?cie contaminante identificada por an?lise mineral?gica (DR-X). As amostras foram classificadas por malha visando verificar a concentra??o do contaminante, bem como a identifica??o das melhores condi??es para sua separa??o em separador magn?tico de alto campo. O processo apresentou extra??o compat?veis com a demanda do mercado.