Got out for an hour today...the broken point would have been a stunner for this area. Not sure if the hard stone pieces are artifacts. They both appear to have been worked. The round is almost a perfect sphere and the triangular piece does not appear natural...
I'm in Nova Scotia. That's the 4th broke quartz notched stem point that I've found on this site that is broken in the same manner...heavily farmed siite.
I'll clean them and post some more pics later today.
probably a iron ore concentration which looks like a type of sandstone mixture they do come in round shapes. Crack it open might be some crystals inside.