I know where 50 slabs of  8' x6"avg thick granite  pavers are that came out
of So Ho and Tri beca...these babys have such a well worn patina of street
wear and oils they really belong in Moma.signed X  marks the spot.
.
Benign Ivan needs to go to Maine; Crotch Island.(Deer Island).and see where
this lovely stuff comes from ;As for the Bluestone thickness..at 20 inches
for pavers.. like the actress said to the Bishop "It's big but it ain't that
big"  Horse troughs; lintels and foundation pieces yeah but pavers.??
.... the story of the paving stone is a story of 19  cent Tamanny Hall marvel
that pitted upstate pork barrel polotics of the Hudson Valleyagainst the
Maine/ New York  flat bottom boat shippers and their Port of Authority
influential  partners. The last time I looked for really big Bluestone I went
to Canada; but its been awhile...a couple of wisebiers or dead presidents may
jog the ol memory. signed  Da blues ....is whats I got...