Definitions for "BLISTER PEARL"
Keywords:  pearl, mollusk, shell, dome, bouton
A pearl that has grown onto the inside surface of a mollusc's shell, so that it is dome-shaped on one side and flattened on the other. See also Mabe pearl.
a pearl that grows attached to the oyster shell on its side
Occasionally when a pearl is being cultured, it becomes stuck to the side of the shell. When this happens the side of the shell with the pearl is taken and cut into a cab shape that includes the pearl or pearls.