Phyllite (/ ˈfɪlaɪt / FIL-yte) is a type of foliated metamorphic rock formed from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation. [1]

Phyllite is a foliated metamorphic rock that has been subjected to low levels of heat, pressure and chemical activity. It is composed mainly of flake-shaped mica minerals in parallel alignment. …

Apr 13, 2019 · Phyllite is mainly composed of fine grains of mica minerals that are muscovite, or sericite. Also fine grained feldspar and quartz are frequently major in phyllite.

phyllite, fine-grained metamorphic rock formed by the reconstitution of fine-grained, parent sedimentary rocks, such as mudstones or shales. Phyllite has a marked fissility (a tendency to …

Nov 7, 2025 · Phyllite is a metamorphic rock, distinguished by a unique, silky luster. Its name is derived from the Greek word phyllon, which translates to “leaf,” referencing the rock’s …

1 day ago · Phyllite is a foliated metamorphic rock, meaning its mineral components are aligned in parallel layers. It forms when fine-grained sedimentary rock, such as shale or mudstone, is …

The protolith (or parent rock) for phyllite is usually shale or pelite, via slate. Its constituent platy minerals are larger than those in slate but are not visible with the naked eye.

Phyllite is a fine-grained foliated metamorphic rock primarily made of quartz, chlorite, and mica minerals like muscovite and sericite. Known for its characteristic silky sheen, it often appears …

Phyllite is a fine-grained metamorphic rock that typically exhibits a distinct sheen, making it visually appealing. Its composition largely consists of quartz and mica minerals, mainly biotite …

Type Metamorphic Rock Texture Foliated; Fine-grained Composition Muscovite, Biotite, Quartz, Plagioclase Index Minerals Color Shiny Gray Miscellaneous Foliation surface has a satiny …