B3U1H4R1S1T1O1N1E1
14 points
BUHRSTONE is validvalid
a siliceous stone used for making millstones
a cellular, flinty rock, used for millstones, also BUHR, BURRSTONE, BURSTONE
a siliceous stone used for making millstones
a cellular, flinty rock, used for millstones, also BUHR, BURRSTONE, BURSTONE