Keishi pearls, is also called reborn pearls and keshi pearls. Keishi pearls are formed when the mollusk ejects the pearl bead nucleus but continues to make a pearl. The pearl size is referred to its longer length range(e.g. 6-8mm). A blister pearl is a pearl that developed attached to the inside of a mollusk shell. This type of pearl must be cut off the shell, and is therefore hemispherical. Just come here and choose your own one!