Kimberlites are not the only rocks that are diamond-bearing. Lamprophyres are another mantle-derived mafic igneous rock that occasionally hosts diamonds. Today’s outcrop is located beside the Trans-Canada Highway north of Wawa, Ontario, Canada. There was a small prospect not far from this locality that was being evaluated for possible diamond production.
Taking a closer look, you can see xenoliths of mantle material entrained in the lamprophyre.
Explore this and all of my 2010 Deskcrops and Outcrops in Google Earth!