Pearl natural pearls and cultured pearls are divided into two categories . Natural pearls are mussels and other shellfish or animal body , without the human factors of natural secretions. Natural pearls are divided into natural seawater pearls and natural freshwater pearls. Cultured pearls are mussels and other shellfish or animal form nacre

Into the matter , nacre layer concentric radial or concentric layered structure . Chemical composition of cultured pearls and natural pearls same . Into seawater cultured pearls and freshwater cultured pearls cultured pearls into two categories, is the most common market . There is also a false pearls.
     Method of identifying genuine pearls :
Can see, touch , smell , bite four simple identification.

     Look, mainly through the eyes of observation, the pearl light observation , can emit light of various exotic . If a string of pearls luster is very uniform , and the colors are dull, dull , you might as imitation beads ; natural pearl colors rich , soft gloss .
    Touch, mainly through hand feeling, natural beads relatively cool , feel cool hand , if we feel the beads little hands warm feeling , and also more greasy , it will have to be careful of imitations.
    Wen is going to buy goods mild heating , if the smell , the smell , it may be false, true pearl is odorless .
    Bite or friction , friction or feeling each other through the teeth of two pearls, pearl biting really have a dry sense or be able to rub the pearl powder, fake pearls have a slippery feel biting
    If you choose a higher -priced pearl , but it can not identify its authenticity , can go to the Pearl Quality and Technical Supervision and Inspection Station for testing.
A pearl is formed :
Depending on the type of pearl pearl formed into the formation of a natural pearl , freshwater cultured pearls ( seedless ) formation and seawater cultured pearls ( nucleated ) formation. They form the steps are as follows :
Natural pearls :
Small foreign invasion - Forming - artificial harvesting
Freshwater cultured pearls ( seedless ) :
Mantle - planting nuclear - Forming - artificial harvesting
Seawater cultured pearls ( nucleated ) :
Small ball mill shell mother - planting nuclear - Forming - artificial harvesting
Note : mother of pearl forming stage of the mantle is stimulated to secrete nacre foreign body wrapped up layer by layer to form a pearl
It is noteworthy that opened to remove the mother of pearl shell , mother of pearl are often injured or killed in the process of artificial harvesting stage.
Cultured pearls are "natural" it?
- Customer focus on natural pearls , is that quality considerations on
- Pearls formed by the above process can be seen , in addition to natural pearls and cultured pearls differ in the initial stages of planting nuclear , other formation process and growth environment is identical
- In other words , the use of artificial breeding techniques pearls only accelerated the formation of pearls , not much impact on the quality of pearls
- In addition , due to the natural pearls are too scarce, harvesting difficulties , making the value is very expensive , and because of the growth environment of instability , external quality cultured pearls are often not good .
- South Sea pearls
Produced in the South Pacific waters ( ie Northwest Marine Australia, the Philippines and Indonesia ) in the vicinity of South Sea pearls , wild mussels in the shell Berry called Baidie bred to grow . Since Baidie Tony is a very precious and fragile creatures , must be stable and unaffected Gulf excellent artificial contamination

Environment to grow, but it is also the world’s largest oyster , out of shape its cultivated South Sea pearls are also bigger than the rest of the production of pearls. Therefore , the value of Southeast Asia is also more expensive.
The value of South Sea pearls are its size, color, shape, luster and clarity to evaluate . Among the eye-catching enough to big round and most precious pink beads as large as those eighteen to twenty millimeters , is quite rare. The shape , the shape of many South Sea pearls , round , oval , ring

Shaped, button -shaped , some irregular shape , the more circular shape is more rare .
Tahitian pearls
Tahitian pearls, pearls and South Sea pearls is different from Japan , can be described as abnormal precious. Because the pearl itself is made of a precious black mussels dish ( only grown in a natural , non-polluting rare mussels Polynesian waters ) farmed out its shades of gray , and with different

Symphony of color , and thus make more pearls with a difference . Plus requires its breeding environment , and pearling process is very rigorous, every hundred black beads for colonization mussels dish , only fifty successfully cultivated a pearl , which is only five more are flawless , so each pearls are priceless

.
To maintain the luster of pearl jewelry, tools and moving, refer to the following:
1 To make the pearl luster and color are not affected, should avoid contact with acidic substances pearl and chemicals , such as perfume , soap, hairspray .
2 Do not wear pearl cooking , steam and smoke because the micro pores through the surface of the pearl , pearl invade the body , making it yellow.
3 After wearing pearls ( especially in summer ) , they should be wiped clean before pearl jewelry tool box back . The best sheepskin wipe , do not use tissue paper , tissue paper attached because some friction agent, will bead leather wear.
4 Do not wash with water beads . Since water can enter the holes in beads , pearls which may cause fermentation , the connection may turn green . As time wore sweat a lot , use a soft wet towel and carefully wipe dry after back jewelry tool box .
5 Because pearls with some water, should be placed in the shade of pearl , try to avoid direct exposure to sunlight , or placed too dry place to avoid dehydration pearls .
6 pearl jewelry, tools should be stored separately to avoid scratching other pearl jewelry tools cortex .
7 Do not hang long the beads , thread a long time will be deformed .