Named for its resemblance to the full moon, the moon jar, called a "dalhangari", was most prevalent from the late 17th to 18th century, during the Joseon Dynasty. Moon jars were manufactured in porcelain for the Royal Court in Gwangju. Moon jars are rare pieces, as few of the larger ones, up to 18 inches remain.
A work in porcelain this large had to be made in two halves, two bowls, top and bottom, and then joined at the center, because it could not be thrown as one piece.
The glaze is thick, milky white, with varying tones of white. The surface of the jars maintain impurities or traces of air bubbles, tiny holes, that were created while the piece was fired. Crazing is found in some parts of the surface which enhances the jars natural beauty.
from Seoul Design Essence, HERE