Carriage-wheel stone bracelet (sharinseki)

Circular object with a central hole, resembling a bracelet. The object is made of stone or ceramic material and has a light blue-gray color with reddish-brown spots and discoloration. It has a ridged exterior with 19-20 visible ridges or pleats that radiate from the center. The ridges are triangular in shape, with the base of each triangle at the outer edge of the circle and the apex at the central hole. The object is circular in shape, with a smooth inner edge forming the central hole. The background of the image is solid black. The object appears to be a Carriage-wheel stone bracelet, also known as sharinseki, by an unknown artist.