what materials are gotten from gneiss
Some gneisses will split along the layers of materials, but most break in an irregular fashion. Gneiss often forms from the metamorphism of granite or diorite. The most common minerals in gneiss are quartz, potassium feldspar, and sodium feldspar.Smaller amounts of muscovite, biotite and hornblende are common.Gneiss can also form from gabbro or shale.ome gneisses will split along the layers of materials, but most break in an irregular fashion. Gneiss often forms from the metamorphism of granite or diorite. The most common minerals in gneiss are quartz, potassium feldspar, and sodium feldspar.