Gneiss (pronounced (nice) is a foliated metamorphic rock characterized by distinct banding or layering, caused by the segregation of light- and dark-colored minerals. Appearance * Shows alternating light and dark bands * Light bands:mostly ,quartz and feldspar* * Dark bands: contain biotite, hornblende, or pyroxene * Often coarse-grained and very hard. Formation (Metamorphism) Gneiss forms through: 1. Regional metamorphism: deep burial and compression over large areas, such as mountain belts. 2.

Which rocks host gold? Gold is usually found in certain geological environments: • Igneous rocks → Especially granites and volcanic rocks, where hydrothermal fluids deposit gold in veins. • Metamorphic rocks → Schist, greenstone, and slate often contain gold, especially along fault zones. • Sedimentary rocks → Gold can accumulate in riverbeds and ancient alluvial deposits (placer gold). In simple terms: gold likes to hide in quartz veins within igneous and metamorphic rocks, and it can also be w