Detail Whole Slab
to overview


The close-up view of each stone type shows a relatively true image of the crystalline structure and the colouring. This is suitable for grained slabs to a limited extend only. In regard to the colour matching, please take an original sample of the stone from your furniture store as a basis.


The reddish, distinguished alkali feldspar crystals, the distinctive, much smaller blue quartz surrounded by black, fine mica scales are noticeable for this dimension stone. 


This gneiss was probably generated under high pressure and temperature from volcanic rock of granite composition.

Hardness Hard Stone
Structure Type Homogeneous Structure
Synonyms Azul Portorello, Red Blue Succuru
Group Metamorphite
Petrographic Assignment Gneiss
Age 570 m. years (Pre-Cambrian)
Colouring Minerals Reddish alkali feldspar, blue-violet quartz, black biotite
Average Hardness 6-7 (according to Mohs's hardness scale 1-10)
Deposit Brazil, Pernambuco, Yucuru