Rock group	Metamorphic
Metamorphism type	Regional High pressure Low temperature
Metamorphic rock class	Metapelite Metabasite
Protolith	Varies
Facies	Blueschist
Common minerals	Glaucophane Jadeite Lawsonite Aragonite

Blueschist in hand sample

Garnet-studded blueschist
Porphyroblastic blueschist from Turkey
Fine-grained blueschist
Medium-grained blueschist

Blueschist in thin section

Blueschist, plane polars

Blueschist in plane polarized light. Magnification: 40x. Click here for crossed polars: https://youtu.be/Ilvv9TUUfhU NVCC slide RR 4.

Blueschist, crossed polars

Blueschist in cross polarized light. Magnification: 40x. Click here for plane polars: https://youtu.be/ElE3-mqVJrk NVCC slide RR 4.