清 青白玉三足圓硯台 配紫檀蓋 Of circular form, the side incised with a band of geometric pattern, the underside carved with four character mark to the center enclosed by a band of key-fret pattern further surrounded by a band of stylized mythical beast motif, all supported with three short stubs. Accompanied with a circular zitan cover decorated with a mother-of-pearl inlaid Taoist symbol to the center and a zitan stand. Qing Dynasty period.