Blueschist

Type	Metamorphic Rock
Texture	Non-foliated to moderatly-foliated; Medium-grained
Composition	Glaucophane
Index Minerals	Glaucophane
Color	Metallic blue
Miscellaneous	Schistose texture
Metamorphic Type	Blueschist (subtype of Regional)
Metamorphic Grade	High P – Low T
Parent Rock	Basalt and Seafloor sediments
Metamorphic Environment	Along subduction zones at convergent plate boundaries