Two whole years are needed to allow the oyster to produce a high quality pearl. During this time, pearl care is devoted to the attention of the oysters. If a pearl is harvested too early, its quality will be poor because the ultra-delicate bag will not have had enough time to train and develop in the best conditions.
A harvest is the result of 5 long years of work, discipline, and above all patience.
The harvest is done in front of the grafters who can judge the work they'd done two years previously. They measure their results and can act on their gesture and technique if necessary.
Then, if the mother oyster is in good health and the grafter judges the harvested pearl as being of good quality, the oyster is grafted once more without waiting. The extracted pearl is simply replaced by a nucleus of similar size. This time, the presence of the graft is not necessary.