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SALTWATER AKOYA CULTURED PEARL

PEARL FARMING

58-hectare PEARL FARM located in Ha Long Bay

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PEARL FARMING

The first step in the pearl

production process is to

obtain pearl-producing

oysters to be nucleated.

The pearl farmer collects

oyster sperm and eggs

from high-quality oysters

already on the farm. The

sperm are used to fertilizethe eggs, and so create a

new generation of oyster

larvae. Over a period of a

few months, the larvae

develop into baby oysters.

They are generally then

moved into a separate

"nursery" area of the farm.

Here they are tended for

around 1-2 years, until

they have grown

sufficiently large to be

nucleated.

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PEARL FARMING

Preparation of pearl-producingoysters before nucleating

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PEARL FARMING

Preparation ofmantle tissue taken from a donor oyster. The nucleus

and mantle tissue are then implanted into the oyster's gonad.

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PEARL FARMING

Creating the pearl nucleus. The nucleus used in all

saltwater pearl farming today is a mother-of-pearl bead.

This bead is composed of mussel shell that has been cut,

rounded, and polished.

A nucleus of high qualitywill be white, without

calcium carbonate

streaking (striation or

banding), that may show

through the pearl nacre.

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PEARL FARMING

The process of nucleation is

a surgical procedure,whereby a foreign object is

implanted into the oyster.

This object causes irritation,

which the oyster

counteracts by secreting

nacre to surround theobject; this produces the

pearl. The mother of pearl

nucleus is inserted into this

incision, which is then

followed with a very small

piece of mantle tissue froma donor mollusk. The mantle

tissue is placed between the

mother of pearl bead and

the gonad, with the side

containing epithelial cells

facing the nucleus.

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SALTWATER AKOYA CULTURED PEARL

PEARL FARMING

Pearl Harvest: Akoya

cultured pearls areharvested from the pearl

farm after a nucleation

period of 18 months to 2

years. A good harvest is

determined by the number

of marketable pearls

produced in relation to thenumber of oysters that were

nucleated.

On average, only half of the pearls

will be marketable, and less than

10% of these will be considered

top-quality.

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SALTWATER AKOYA CULTURED PEARL

PEARL TREATMENTS

Pearl treatments are defined as any action other than polishing

which alters a pearl's appearance which may include: irradiation,bleaching, heating, filling, waxing, drilling, cutting, dyeing and

luster treatments .

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Visitor from USA

July 2008

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Visitors fromJapan and Hong Kong

April 2010

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CONTACT DETAILS

SECOIN INVESTMENT CORPORATION59 Hang Chuoi street, Hai Ba Trung district, Hanoi, Vietnam

Tel: 84-4-39718899, Fax: 84-4-39718898E-mail: dxb@secoin.vn, dixuba@gmail.com; URL: www.secoin.vn

http://www.getamarket.com/secoinbio; http://culturedpearl.ning.com/

REFERENCES

http://www.pearl-guide.com/forum/akoya-pearls/2852-vietnamese-akoyas-report-ha-long-bay.html

http://www.pearl-guide.com/forum/akoya-pearls/2962-utube-video-pearl-farm-vietnam.html#post39032

http://www.youtube.com/watch?v=gdLEx9HUByw

http://www.youtube.com/watch?v=GZvRQfPyKBg

APPLIED BIOLOGY CENTER

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