BACK TO gneiss
gneiss vs. granite
[ nahys ]
- a metamorphic rock, generally made up of bands that differ in color and composition, some bands being rich in feldspar and quartz, others rich in hornblende or mica.
[ gran-it ]
- a coarse-grained igneous rock composed chiefly of orthoclase and albite feldspars and of quartz, usually with lesser amounts of one or more other minerals, as mica, hornblende, or augite.
- anything compared to this rock in great hardness, firmness, or durability.