How is the bowl described in the story, Janus?

"The bowl was perfect."

".... it was both noticeable and subtle."

"There were a few bits of color in it—tiny geometric flashes—and some of these were tinged with flecks of silver. They were as mysterious as cells seen under a microscope; it was difficult not to study them, because they shimmered, flashing for a split second, and then resumed their shape. Something about the colors and their random placement suggested motion."