Mica schist
Rock
Also called Muscovite schist and Biotite schist
About it
Schist dominated by muscovite or biotite, glittering silver or bronze and splitting into flakes; it often holds garnet, staurolite, or kyanite crystals. Common in the Appalachians and the Scottish Highlands.
- Type
- Rock (metamorphic)
- Group
- Metamorphic (foliated)
- Lustre
- pearly
- Colours
- silver, grey, brown, gold, black
- Transparency
- opaque
- Cleavage and fracture
- splits along foliation (schistosity)
Typical values: real specimens vary. For more, see mindat.org.