In cultured pearls, a mother-of-pearl bead or a piece of tissue is inserted (by man) into the mollusk to start the process. For both, the quality of the nacre dictates the quality of the luster, or shine of the pearl, which is very important to its beauty and its value.
For an airplane pilot, education takes many forms, including applied instruction, a high school diploma, an associate's or bachelor's degree, and specialized training. The Federal Aviation Administration also requires pilots to accumulate a lot of real-world knowledge in the form of flight-hours.
Professional pilots receive regular recurrent training to include emergency procedures whether they fly as an astronaut, an airline pilot, a military pilot, a law enforcement pilot, an EMS, charter or corporate pilot. Some of their training is FAA mandated, some company mandated, and some is pilot requested.