Grafting for cultured pearls is a process similar to the one to produce a natural pearl, whether the foreign body is a grain of sand, a parasite, or a small shell bead by hand, if it is accepted by the oyster it will eventually become a pearl. Grafting is a high-skill task and must be done quickly to maximize the chances of success.
Every year between January and March is the best time for Pearl nucleation. First of all, I would like to introduce the mother of Pinctada martensii. Pinctada martensii is an important marine shellfish and the main shellfish for Pearl production.Chinese seawater pearl is produced by pinctada martensil .We usually call it Hepu pearl, internationally is called “Akoya pearl”. Pinctada martensil originates from the south China sea. In the middle of last century, the Japanese came to China to cultivate pearls. After years of practice, they finally invented the nuclear insertion technology of seawater pearls. At that time, the wild mussel of Beihai Guangxi was introduced to Japan and bred. Therefore, the Japanese AKOYA pearl is the same variety as the Chinese Hepu pearl. However, since Japan was earlier in terms of internationalization than China, this pearl is known as AKOYA PEARL abroad.Click here to browse a selection of popular pearl jewelry items.
The first step is to sort out the female shellfish and keep them in the sea for one year before they can grow to the size suitable for inserting nuclei. In the process of growth, female shellfish are often glued together and sorted for three purposes.
Firstly, the female shellfish are divided into single individuals for operation. The second is to remove the dead female shellfish. Thirdly, the female shellfish that are not big enough should be separated and put into the farm to continue to breed, and then collected when they grow up.
The female shells were separated by knife and the parasites and dirt on the shells were preliminarily removed. After sorting, it is cleaning. This step is relatively simple, that is, putting the female shellfish into the net pocket, after several times of sea water, and then fishing out almost. Then, the cleaned female shellfish would be sent to the nuclear insertion technicians for the operation.
One of the key factors of Pearl nucleation is “nucleus”. The “nucleus” of pearls in Beihai is mostly made of freshwater mussel shells produced in Zhanjiang area and polished 0.3 grams of small beads.
The first step in nuclear insertion is to uncover the female fritillaria. The tool used is a special copper tweezers with an annular clamp in the middle, which can fix the opening width. Another tool is a small cone, which is used to uncover the opening of the bag and feed it into the nucellus. At present, the insertion of nuclei mostly uses three locations: the left sack: located at the slightly proximal end of the abdominal ridge, i.e. the anterior part of the intestinal circuitous part and the genital gland in the ventral part of the constrictor muscle. Right Bag: Under the body surface between the digestive cecum and the constrictor muscle on the right side of Fritillaria margarita. Lower foot: On the left side of the Pearl Account v., it is located on the back of the base of the contractile foot muscle, between the pericardial cavity and the cloaca, and on the side of the cloaca.
Technicians open the live pearl oysters then gently surgically implant a small shell bead along with a tiny piece of mantle tissue. This bead is the nucleus around which the oyster secretes layer after layer of nacre, the substance that forms the pearl. This step of the culturing process requires tremendous skill and precision. The oysters will only allow their shells to be pried open 2 to 3 centimeters or they will reject the nucleus. Experienced technicians use exacting tools to make the tiny incisions.