A compilation of fossil and mineral collecting localities, with maps, in western Massachusetts by Alan R. Plante.
A PDF of popular Massachusets Mineral and fossil localities compiled by Peter Gleba in 1978, revised in 2008.
"Mindat is the largest mineral database and mineralogy reference website on the internet. This site contains worldwide data on minerals, mineral collecting, mineral localities and other...
A list of rock, fossil, and mineral clubs in Massachusetts maintained by the Eastern Federation of Mineralogical and Lapidary Societies