While the predominance of pearls found in the world are white or cream colored in nature there are black pearls which are produced naturally in their highly valuable due to their rarity. The reason that black pearls are so rare is that the culture in process takes a lot longer time and can not be duplicated with the same mass-produced culturing process which exists for regular pearls. If you are interested in getting any piece of jewelry that is made with black pearls and you should definitely speak to your jeweler first about the availability in your area and make sure that you're not being ripped off by some unscrupulous characters. If you want to have your jewelry verified by a third party then you should certainly seek that out before you give them any money over to a jeweler.
Black pearls are beautiful and very rare and this fact should put you on alert for any type of Black Pearl jewelry which you think is under priced for the quantity of pearls that exists within it. If you feel like you may be being taken for a ride then you should most certainly report your case to the proper authority is to save yourself as well as others in the future from being ripped off by dishonest retailers; turning somebody and who is doing illegal practices will make the local authorities over there as well as a person doing the deed that this sort of thing will not be tolerated in your sphere.
Though if you do find black pearl jewelry you should certainly check it out. You should ask about the history of the black pearls and a history with the manufacturer to see if they have a track record of good service and if they have been cited by the Better Business Bureau for less than scrupulous practices. So with a nice pieces of jewelry that you can perhaps own one day are black pearl necklaces, black pearl rings, black pearl hearings, in black pearl pendants to name a few. Some of the combinations with a black pearl include Black Pearl and diamond rings which of course are very beautiful and are much sought after by women all around the world.
What you may be finding when you are looking for black pearl jewelry is Tahitian Black Pearl. Tahitian Black Pearl oysters found near this specific island has been extensively used to culture and widely produce black pearl jewelry for the world. So if you see a Tahitian black pearl necklace and you want to know why it is so inexpensive, that is probably because it has been cultured.