Black Donald Mine, Brougham Township, Greater Madawaska, Renfrew County, Ontario, Canada
from Sabina's guide to Rocks and Minerals http://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/downloade.web&search1=R=222658
Picture from OGS document IMR 020, Graphite in Ontario by D.F Hewitt 1965.
© Ontario Geological Survey.