A small brush washer of rounded form, covered overall in a deep mottled glaze of dark blue to black tones with subtle speckled effects. The surface has a soft, satin-like sheen, with areas of lighter iridescent blue emerging under the light, giving it a starry or “oil-spot” appearance. The glaze suggests a kiln-transmutation or flambe-style effect, though precise classification would require further examination. The body appears to be stoneware; it may possibly be Yixing (zisha) clay, though this cannot be confirmed without closer inspection. The base bears an impressed maker’s seal mark. There is a visible hairline crack to the base, as shown in the images. The item will be professionally packed to ensure safe and secure delivery.