ANITQUE ART POTTERY NILOAKSWIRL MISSION WARE MISSIONWARE VASE This is a very pretty swirl design Niloak Mission ware vase. Made of marbleized clay in shades of blue, tan and brown. With early mark impressed with Niloak, which is the backward spelling of Kaolin, a high-grade clay. It was produced most likely from between 1910 and 1920.Unnusual glazed interior. Size:3 1/2" high,1 3/4 wide base, 2 5/8 " widest part Con dition: Excellent. No chips, cracks, or hairlines.