Clinochlore (Var: Corundophilite), Corundite, Margarite
Wright Mine, Chester Emery Mines, Chester, Hampden County, Massachusetts, USA
A largish, 10x9x4 cm, sample of fine-grained dark iron-rich chlorite (corundophyllite) intermixed with fine-grained emery (in this case corundum plus magnetite), with some micaceous pink margarite. Collected in the early 1990's.
S417-276
© 2010, JGW