Saucer with stylised flowers and precious objects

Porcelain dish with lobed rim, painted in underglaze blue. On the flat surface a rosette with a flower in a circle in reserve at the center, from the flower four lines ending in a flower in reserve, branches in reserve on the circle; on the rim stylized floral scrolls alternating with three lines; the reverse with four precious stones (pearl, diamond). Marked on the underside with the four-character mark of Emperor Yongzheng (?) in a double circle. A chip in the rim. Blue and white.