Minecraft wiki entry for Glazed_Terracotta, associated text: The first instance of glazed terracotta appears in this banner for snapshot 17w06a. (Magenta, top center of structure)
A complex terracotta pattern that uses multiple colors to achieve a rich carpet effect.
Several more complex multi-color terracotta patterns.
A terracotta pattern using 14 kinds of terracotta block.
Purple glazed terracotta generating in underwater ruins.
All of the radial glazed terracotta patterns, shown in a continuous arrangement next to their unglazed counterparts.