Phyllite vs. Slate — What's the Difference?

Phyllite ( FIL-yte) is a type of foliated metamorphic rock created from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation. It is primarily composed of quartz, sericite mica, and chlorite.Phyllite has fine-grained mica flakes, whereas slate has extremely fine mica flakes, and schist has large mica flakes, all mica flakes of which have achieved a preferred orientation.

Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock.

A green, gray, or red metamorphic rock, similar to slate but often having a wavy surface and a distinctive micaceous luster.

A fine-grained metamorphic rock that splits into thin, smooth-surfaced layers.

(geology) A type of metamorphic rock formed from clay-rich sediments called pelites.

A piece of this rock cut for use as roofing or surfacing material or as a writing surface.

A mineral related to ottrelite.

A writing tablet made of a similar material.

A record of past performance or activity

A list of the candidates of a political party running for various offices.

A dark or bluish gray to dark bluish or dark purplish gray.

Made of a fine-grained metamorphic rock

Of the color slate.

To cover (a roof, for example) with slate.

To put on a list of candidates.

To schedule or designate

A fine-grained homogeneous sedimentary rock composed of clay or volcanic ash which has been metamorphosed so that it cleaves easily into thin layers.

(uncountable) The bluish-grey colour of most slate.

(countable) A chalkboard, sheet of slate for writing on with chalk or with a thin rod of slate (a slate pencil) formerly commonly used by both students and teachers in schools.

(countable) A roofing-tile made of slate.

(countable) A record of money owed.

A list of affiliated candidates for an election.

An artificial material resembling slate and used for the same purposes.

A thin plate of any material; a flake.

A tablet computer.

Having the bluish-grey/gray colour of slate.

(transitive) To cover with slate.

To criticise harshly.

To schedule.

To anticipate or strongly expect.

To set a dog upon (a person).

To nominate, appoint, or designate.

An argillaceous rock which readily splits into thin plates; argillite; argillaceous schist.

Any rock or stone having a slaty structure.

A prepared piece of such stone.

An artificial material, resembling slate, and used for the above purposes.

A thin plate of any material; a flake.

A list of candidates, prepared for nomination or for election; a list of candidates, or a programme of action, devised beforehand.

To cover with slate, or with a substance resembling slate; as, to slate a roof; to slate a globe.

To register (as on a slate and subject to revision), for an appointment.

To set a dog upon; to bait; to slat. See 2d Slat, 3.

(formerly) a writing tablet made of slate

Thin layers of rock used for roofing

A fine-grained metamorphic rock that can be split into thin layers

A list of candidates nominated by a political party to run for election to public offices

Designate or schedule;

Enter on a list or slate for an election;

Cover with slate;