From today's "New York Sun" "Developers Mull Uses for Rare Rock Excavated in Tunnels" Refers to Manhattan Schist from Second Avenue Subway tunnels. So, when is schist - the pigeon guano of New York - rare? Quotes $100 psf (instead of $15 psf for granite) --- but isn't that because it's not available because of low demand, not actually scarcity? cHRISTOPHER ************************************** See what's free at http://www.aol.com. -- To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: <http://listserv.icors.org/archives/bullamanka-pinheads.html>