A beautiful piece for meditation and inspiration. The nautilus, from the Greek for sailor, is a nocturnal creature, spending most of its life at ocean depth. Its shell, lined with mother-of-pearl, grows into increasingly larger chambers throughout its life and so has become a symbol for expansion and renewal. Sometimes called a living fossil for its long existence on the planet, the beautiful and proportionally perfect nautilus shell exemplifies a special kind of spiral curve which appears in nature called a logarithmic spiral, or miraculous spiral. One of this spiral?s unique mathematical properties is that the size of the spiral increases, but its shape is unaltered with each successive curve.