A majestic marble bicycle, sleek and graceful, with a frame entirely made of smooth, polished marble. The bicycle's surface features natural veining typical of marble, with a white base color and intricate gray, blue, and gold patterns running throughout its form. The wheels and handlebars are finely detailed, exuding an air of mobility and freedom. The marble bicycle is depicted resting on a rugged road, with small flakes of snow settling on its marble form, under a sky glowing in twilight hues.