Some kinds of colored pigments are used for painting of figures and geometric patterns on the decorated chamber walls of mounded tombs in Kyushu. Green pigment collected from four tombs in Fukuoka Prefecture, some of which has been considered as glauconite, was examined by a Gandolfi camera, and newly identified as celadonite. The source of this mineral for the pigment should be pursued hereafter. The present study has made clear that this type of experimental approach will be effectively applied to the archaeological research of the pigments.