This is a spectacular antique Wedgweood tea set. It dates to 1820-1840 and is made of white stoneware, an uncommon body used almost exclusively during this time period.
This stoneware is porous, unlike most Wedgwood dry bodies, so it had to be protected, either by salt-glazing (lining the kiln with salt) or by smear glazing (brushing a clear glaze onto the surface of the pieces. This set is smear glazed, which gives it a lustrous appearance.
The set is in a florid Gothic Revival style, which is an obvious reaction to the Classicism of the late 18th century. The shape of all three pieces consists of a row of quatrefoils with grotesque heads in the center each. Above that is a row of long, pentagonal shapes with florid foliate designs separated by rectangles with smaller quatrefoils in the center of each. The lid repeats these last two shapes. There is a a flat, hexagonal area at the tops of the lids, with a flame-shaped finial in the center of it.
The teapot is 4.75" tall and 7" from handle to spout. The sugar is 4" tall and 4.5" across the handles. The creamer is 3" tall to the handle and 4.75" from handle to spout.
Condition on this set is excellent: aside from a small rust stain in the interior of the teapot and a firing crack in the glaze along the edge of the handle on the teapot, the set is as new, no chips cracks, repairs of damage. It is surprising to think that these three pieces are over 150 years old! Especially given how finely potted these pieces are.
All three pieces are marked on the bottom with the "WEDGWOOD" block capital mark. The teapot also has the number 153 on the bottom and all three pieces have the usual potter's and decorator's marks.
The teapot in this set is illustrated in Daniel J. Keefe's "Wedgwood Ceramics" on page 204, in the section "Other Dry-Bodied Stoneware".