The object shown is a 
vintage ceramic shell-shaped planter, likely produced by Haeger or McCoy pottery companies. 
Details
  • Maker: The style is characteristic of planters made by American companies such as Haeger and McCoy during the mid-20th century.
  • Design: It features a graceful, scalloped shell design on a footed base, sometimes referred to as a "cornucopia" or "seashell style" planter.
  • Color/Finish: The piece in the image appears to have a creamy or matte ivory white glaze.
  • Function: While it resembles a dish or gravy boat, it was typically marketed and used as a ceramic planter or decorative vase.