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This stone internationally may be nominated as a granite. For the US- and Chinese market this is correct according to ASTM C 119 resp. GB/T 17670. But in the area of application of the European Standard (EN) this stone must be nominated as syenite because the EN 12440 demands a scientific terminology for the denomination of natural stones, determined with a petrografic examination according to EN 12407 and 4.2 of prEN 12670. In case of doubt please ask your supplier.
A wavy, blue quartzite of the Precambrian period, colour caused by dumortierite, Portuguese "azul" = blue. Mineral distribution on the average: quartz: 78%, dumortierite: 12%, muscovite: 10%. Technical and physical characteristics: Bulk density according to ABNT NBR 12.766: 2,683 kg/dm³, bending strength according to ABNT NBR 12.763: 20,39 N/mm², compression breaking load according to ABNT NBR 12.767: 210,20 N/mm², abrasion resistance according to ABNT NBR 12.042 (Amsler): 0,54 mm (500 m), water absorption