metamorphic
Granite Gneiss
Gneiss
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale; displays distinct alternating light and dark compositional banding (gneissic banding); vitreous to dull luster; granular texture.
Identified More metamorphic →
Explore Granite Gneiss in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 6-7 on Mohs scale; displays distinct alternating light and dark compositional banding (gneissic banding); vitreous to dull luster; granular texture.
Formation & geological history
Formed through high-temperature and high-pressure regional metamorphism of pre-existing igneous or sedimentary rocks deep within the Earth's crust.
Uses & applications
Used extensively as a dimensional stone in construction, building facades, flooring, and monumental architecture.
Geological facts
Gneiss is among the oldest known rocks on Earth, with some formations dating back over 4 billion years.
Field identification & locations
Identified easily by its characteristic zebra-like light and dark mineral bands; found worldwide in ancient continental shields.
More like this
