Boston Common - Niche Media - A side of Boston that's anything but common.
Issue link: http://digital.greengale.com/i/603939
clockwise from top left: Emeralds at the Kagem mine in Zambia are sourced from huge open pits; because emeralds are so brittle, hand tools are used to remove them from the surrounding rock; raw emeralds; a worker at the Kagem mine.