metamorphic

Silver-colored mica schist

Muscovite–quartz schist, possibly with biotite

AI-generated identification · may be incorrect

Typically Mohs hardness 2–3 for muscovite and 7 for quartz; silvery-gray, strongly foliated, with pearly to vitreous luster. Platy mica flakes produce obvious sparkle and cleavage, while quartz forms harder granular layers.

Identified August 19, 2026More metamorphic →

Explore Silver-colored mica schist in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed when mica- and quartz-rich sedimentary or igneous rock was subjected to regional metamorphism, commonly during mountain building. Exact age cannot be determined from the photograph; such rocks range from Precambrian to recent orogenic belts.

Uses & applications

Used locally as decorative stone, landscaping material, and occasionally dimension stone, but its friability limits construction use. Attractive specimens are collected for their metallic-looking mica foliation.

Geological facts

The silvery appearance is usually caused by muscovite mica, not native silver. Its foliation reflects alignment of minerals under directed pressure and temperature.

Field identification & locations

Identify it by thin, bendable or flaky reflective sheets, pronounced layering, and a mixed hard-soft surface; a steel point scratches mica but not quartz. Common in metamorphic mountain belts worldwide, including the Appalachians, Alps, Himalaya, and Precambrian shields.