Processing ornamental rocks produces up to 80% weight residues, which may become an environmental problem. In this work, we analyzed residual powders from cutting and crushing Cinza Corumbá granite, to study the influence of mechanical processes in the properties of the residues. The powders were characterized by X-ray diffraction and fluorescence, infrared spectroscopy, scanning electron microscopy, surface area determination and adsorption of methylene blue.The same elements (Si, Al, Na, K, Ca, Fe, Mg e Ti) and minerals (quartz, microcline, oligoclase, andesine, biotite, titanite and magnetite) are found in both powders but the powders formed by crushing contain oil residues, from the lubricant used in the crusher. Particle shapes of the crushed powder (surface area 2.85 m 2 /g) are more irregular than cut powder (surface area 1.98 m 2 /g). Adsorption of methylene blue is lighter in the crushed powder than in the cutting powder. The cutting powder is hydrophilic while the crushed powder is hydrophobic due to the incorporation of crushing oil.