As inclusions in pyrope porphyroblasts developed during high-pressure (25-30 kbar), medium-temperature (700 �C{800 �C) metamorphism of continental crustal rocks.
IMA Status:
Approved IMA 1986
Locality:
Dora-Maira massif, Parigi, near Martiniana Po, Piedmont, Italy. Link to MinDat.org Location Data.
Name Origin:
Named for Francois Ellenberger, Paris, France, for his geological work in the western Alps.