Banded Gneiss

Hardness of 6-7 on the Mohs scale, characterized by distinct alternating light and dark compositional bands (foliation/gneissic banding), vitreous to dull luster, granular crystal structure, specific gravity around 2.6-2.9.

Formed through high-grade regional metamorphism of preexisting igneous (like granite) or sedimentary rocks under extreme heat and pressure, typically occurring deep within the Earth's crust during mountain-building events over millions of years.

Used in construction, as crushed stone for road bases, building facades, dimension stone, and decorative landscaping.

Gneiss is one of the most common rocks in the Earth's continental crust. Some gneiss formations contain some of the oldest rocks found on Earth, dating back over 4 billion years.

Easily identified by its characteristic alternating bands of light-colored minerals (like quartz and feldspar) and dark-colored minerals (like biotite and amphibole). Commonly found in shield areas and ancient mountain roots worldwide.