Porto Rosa Granite is an exotic and distinctive natural stone, quarried in Brazil. Although some sources may classify it as a black mylonitic biotite gneiss, it is often referred to as granite due to its similar characteristics. This unique stone features a captivating combination of black as the dominant color, complemented by flowy veins in white and ash brown.

The deep black base of Porto Rosa Granite sets a bold and dramatic tone, while the white and ash brown veins add intricate patterns and a sense of movement to the stone. The mylonitic biotite gneiss characteristics contribute to the overall texture and appearance, creating a visually striking and unique aesthetic.

This granite is known for its exotic and luxurious appeal, making it a sought-after choice for a variety of interior and exterior applications. Common uses include countertops, flooring, wall cladding, and decorative features. The contrast between the dark background and the flowing veins adds depth and visual interest to any space where Porto Rosa Granite is applied.

Quarried in Brazil, Porto Rosa Granite not only reflects the geological richness of the region but also offers a versatile and stunning option for those seeking an exotic and elegant stone for their architectural and design projects.

Commercial name: Porto Rosa Granite
Petrographic Classification (Scientific Name): Mylonitic biotite granite gneiss 
Ensaio Valor Obtido Desvio
Reference Standards
Apparent dry density  2.721 kg/m3 11 ASTM C-97; ABNT-NBR 12766/92
Apparent porosity 0,37 % 0,03 ASTM C-97; ABNT-NBR 12766/92
Water absorption 0,14 % 0,01 ASTM C-97; ABNT-NBR 12766/92
Abrasion wear (Amsler) 0,38 mm (500 m)
0,74 mm (1000 m) - ABNT-NBR 12042/90
Linear thermal dilation coefficient 6,8 x 10-3 mm/m°C - ASTM E-228; ABNT-NBR 12765/92
Uniaxial compression in the natural state 193,6 MPa 13,8 ASTM C-170; ABNT-NBR 12767/92
Uniaxial compression after freeze/thaw (*) 204,2 MPa 6 ASTM C-170; ABNT-NBR 12769/92
Traction resistance in flexion 27,29 MPa 3,76 ASTM C-99; ABNT-NBR 12763/92
ASTM – American Society for Testing and Materials; ABNT – ABNT - Associa. Brasileira de Normas Técnicas