Maybe not everyone know that there are natural pearls produced by rare shellfish, which have a color and look very different instead the pearls that we usually see.Today almost all the pearls on the market, the ones we see in the showcases or wearing by a friend, are cultured pearls that are produced by a shellfish, however, through human intervention. Depending then on the type of shellfish, we can have the classic distinctions between freshwater pearls, Sea pearls, Australian or Tahitian pearls. So when we speak today of natural pearls ( formed in the clam randomly, in response to the intrusion of a foreign body) is meant to those that can be seen in museums or an auction of antique jewelry. There are also different types of rare and almost unknown pearls produced by mollusks still not grafted by man like pearls melo melo and conch pearls. In both cases it is of calcareous concretions produced in response to the intrusion of an irritant agent within a mollusc, we are therefore faced with the unique and extraordinary natural gemstones.
The Melo Melo are produced by a giant snail (the Melo Melo Zebrata fact) that lives in the China sea. They are generally medium to large size, can measure from 8 to 40 mm, and has shapes from round to oval. The colors range of the Melo Melo pearls is from dark brown to orange which is the most sophisticated staining. As like the Conch pearls, the color of these pearls tend to fade over time.
The Conch pearls are produced by the mollusk Strombus gigas that lives in the Caribbean Sea. They are mainly small and Baroque oval and generally, are pink, yellow, brown or white. The most sought color is salmon or pink-orange. A main feature of Conch pearls color is the flame structure, a kind of intense luminescence that runs on their surface and that makes them unique. Despite numerous attempts, to date it has not been possible to grow this type of pearls; if you see a jewel like this, you can rest assured of being in front of a gemological rarities!