The flagstone es are large, five by five panels of cleanly weight stone. Likely very thick as they don't give way at all when trod. They are covered with deeply carved swirling lines, designed to mimic the look of fluid in motion. You do notice, through the water, that the ridges and swirls don't seem to be muted, faded, or eroded in any way. These tiles are unique to the four hallways. Not even the space beyond has this type of flooring.
As for the statues, upon inspection they are nearly featureless. Perfectly smooth to the eye, almost as if they were cast purely from liquid. In all your years studying stone and rock, you've never seen something this immaculately smooth. As you bend close you cannot see any imperfection, any divots, no pores. Not even highly polished stone is this blemish free. They stand over 8 feet tall, though nothing but blobs.