Beola Grigia Gneiss - Beola Grigia Servezzo Gneiss

Beola Grigia Gneiss - Beola Grigia Servezzo Gneiss

Also called Beola Grigia Classica. Denomination according to UNI EN 12440: Beola Grigia dell'Ossola. Smooth gray-colored Ortogneiss, medium-fine grained (greater than the Beola Ghiandonata), homogeneous; equigene foliate weaving and rare mineralogical lineation. The mica have a medium grain and are present in thin discontinuous levels, with regular millimeter spacing. Mineralogical composition: quartz, K-feldspar (microcline), plagioclase, biotite and muscovite in approximately equal proportions, rare chlorite and epidote.

Extraction area

1 - "Piodale" quarry Tronto (VB) 2 - locality Scarepi, Trontano (VB)

Geological location

1 - Fobello-Rimella schist (Austroalpino) 2 - Monte Rosa fissure (Upper Pennidico) 3 - Orselina-Moncucco-Isorno area (Upper Pennida)

Prevailing uses

civil construction

industrial building

Street furniture

interior design

funerary art