Vintage Blue & Tan Japan Iridescent Lustreware Coffee Pot Teapot Great used condition! No chips. Some of the finish shows wear from use. See photos for details. Measures aprox 4 1/4" x 5 1/2" Lustreware is a type of ceramic painted with an iridescent metallic pigment over a glaze. It was initially used to decorate glass in Iraq, where it originated in the 10th century. Most Japan lustreware was imported from the mid-1920s to the end of the 1930s.