Epidote (Epidote Group) - Ca₂Fe(Al₂O)(OH)(Si₂O₇)(SiO₄) A hydrous calcium iron-aluminum silicate.  A very nice, outstanding group of Epidote around a double terminated quartz crystal. From Castrovirreyna Dist., Huancavelica Dept., San Geraro Mine, Peru. Specimen is 5.5 cm (2-1/8") wide by 5 cm (2") deep by 6 cm (2-3/8") high. Quartz is double terminated and is 7 cm (2-3/4") long.