Palisades texture  

The region of coarser-grained quartz in the upper center portion of this photomicrograph was probably originally occopied by coesite, the high-pressure polymorph of quartz.

UNC sample

TS-42

(K. Stewart)

Rock type

qtz-ky-gt-musc schist

Locality

Dora Maira Massif, Parigi, Italy