IN the midwest, the pink jaspar from upper minnesota and into south Dakota
was considered pipe stone. It looks and feels like a granite but is actually
a dense sandstone. considering the fact that Manhattan rests on schist ( a
form of granite, I think), could your pipestone have been this,or a strain of
harder sandstone from the connecticut region?  Just a thought

just sign me:
"wrote my thesis on building stone and have been obsessed ever since"
anne s in chicago