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.
The percentage required for both will be different. For applying for the IAF to become a pilot you need to write the UPSC exam. The minimum percentage for appearing for this exam is 60% in +2. Now to become a pilot in any of the commercial airlines, you need to get a pilot license.