Coesite (center of inclusion) and recrystallized quartz (borders of inclusion) form a tiny inclusion in nearly pure endmember pyrope garnet from the famous Dora Maira massif of Italy. The presence of coesite (a high-pressure polymorph of quartz) indicates that this rock saw extremly high pressures during metamorphism (probably more than 28 kbar).

UNC sample


(K. Stewart)

Rock type

qtz-ky-gt-musc schist


Dora Maira massif, Parigi, Italy