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Black Pearls
Pearl Types
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Black pearls, actually, are not necessarily black. Pearl oysters are black- lipped oysters that secrete black nacre. Therefore it is the oyster source that determines how a pearl is called.Based on its nature dark color, a black pearl usually appears colorful from various angles.So the so-called black pearls sometimes look green, pink, lavender, blue .Because of its changeable metal luster ,the beauty of a black pearl is beyond all comparison of its kind.

Before the days of cultured pearls, black pearls were rare and highly valued for the simple reason that white pearl oysters rarely produced naturally black pearls, and black pearl oysters rarely produced any natural pearls at all. Currently,two important natural habitats of black pearls were found in Tahiti island of Polynesia( produce 95% of the black pearl in the world) and Cook Island(produce 5%of the black pearl in the world)

black pearls. "Black pearl" is a generic term that refers to pearls from:

• Rainbow-lipped (western-winged) pearl oysters (Pteria sterna), Eastern Pacific between Baja California & Peru.

• La Paz pearl oysters (Pinctada mazatlanica), Eastern Pacific between Baja California & Peru.• Black-lipped pearl oysters (Pinctada margaritifera), Western to Central Pacific & Indian Oceans.

• If you wander in any corner of the streets in Hongkong , you may probably find strands labeled "black pearls" that sell for a couple hundred dollars. Some of them are artificially made whose color is less desirable than you can expect. “Black pearls” should be of natural color to deserve to reputation of "black pearl".

Since the development of pearl culture technology, the black pearl oyster found in Tahiti and many other Pacific Island areas has been extensively used for producing cultured pearls. Over 99.9% of the black pearls sold on the market today are cultured. Natural Pearls are too rare to find, so don't expect to find them in your local jewelry store. Natural-color black pearls resemble natural-color "blue pearls” in appearance, while blue pearls derive their color from foreign contaminants in the nacre itself or between the nacre and the shell bead nucleus. Naturally colored dark Akoya pearls are good examples of blue pearls. They may be blue, black, gray or brown. Black pearls and blue pearls can look almost the same but because of the difference in the origin of their color, blue pearls are worthless. Another reason for their lower value of blue pearls is that blue pearls might decay or lose their color if holes are drilled through them. Since there can be a great value difference between black pearls, blue pearls and artificially colored pearls even though they may look the same, consumers need to be concerned about buying black pearls that are misrepresented. Keep in mind, though, that the only sure way to identify a natural-color black pearl is to send it to a lab and have it tested.
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