Mermaid's Envy Mabe Blister Pearl 925 Silver Labradorite Gemstone Statement Necklace NEW NWT Mabe pearls are a type of cultured pearl that are grown on the inside of a mollusk's shell. They are also known as blister pearls. Mabe pearls are half-pearls that are cultivated on the inside of a mollusk's shell. A small nucleus, usually made out of mother of pearl, is attached to the shell of the mollusk and left to accumulate nacre over a period that usually runs about two or three years. Mabe pearls are unique due to their flat back, which allows them to be easily mounted on jewelry. They promote inner wisdom and calmness.