The GRIS DUQUESA is a gray rock with some pink zones, compact and with fine grain. LOCATION: The GRIS DUQUESA is quarried in Spain, in the province of Navarra, at the town called Aldaz de Larraun. It is a limestone in dolomiting process, following planes or veins in which fossil remains can be found.

Any surface finish for this kind of rocks can be used. This rock must be utilized according to the international laws about marbles and limestones that get brightness by polishing.

CARACTERÍSTICAS FÍSICO-MECÁNICAS PHYSICO-MECHANICAL PROPERTIES
Masa volúmica Volumetric weight	2,71 grs/cm3
Coeficiente de absorción Coefficient of absorption	0,02 %
Porosidad Porosity	0,13 %
Resistencia mecánica a la compresión Compression strength	685 Kg/cm2
Resistencia mecánica a la flexión Flexure strength	279 Kg/cm2
Resistencia al desgaste Friction wear resistance	0,28 mm
Resistencia al impacto Impact strength	35 cm
Microdureza Knoop Knoop microhardness	150 Kg/mm2

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