5" x 3.25"
Says, "Earth crust from Mid-Atlantic Ridge and space dust from K-T Band". Black lustrous glaze inside and blue thumb-well.
4.75" x 3.5"
Interior white overlapped by a lip-dip of black glaze makes bluish. Lower exterior is the Earth crust slurry, speckled band is the sediment with the iridium anomaly. More info available by using drop-down menu of Collected Mud Stories, click on "Mid Atlantic Ridge and Cretacious Tertiary Boundary".