Nacre is the substance that coats the inside of the shell as well. It is made up of tiny pieces that form layers thus coating not only the shell but the intruding particle. It is strong, iridescent and resilient.
Man has managed to duplicate this process by opening the shell and carefully inserting a piece of shell that has been rounded and polished, along with a piece of the animal from where it originated.
After some time passes, the shell is harvested and a pearl is extracted.
In both instances the system is the same but the pearl that is extracted from the animal that contracted the parasite, or the tiny grit, is called a natural pearl and the pearl that was extracted from the animal that had the round bead inserted in it is called a cultured pearl.
The Mohs scale is used to classify all minerals and diamond, …
Pearls come in eight unique forms that are categorized into three broad categories including the spherical (perfect round and semi-round), symmetrical (button, tear drop, pear and oval) and baroque (irregularly ringed). The uncultured spherical (perfect round and semi-round) pearls are the rarest, elite and the most expensive ones, used generally in necklaces and strings holding a distinct value in the gemstones family. Similarly, the symmetrical (slightly flattened button pearls, teardrop, and pear) pearls which are known to be the choicest pearls for the drop down jewelry are a sign of juvenile beauty. The other types of pearls are comparatively less precious and can be found at a slightly lesser value and mostly they attract the people who like uniqueness and a rare look.
Generally measured in millimeters, they can range in size from 1mm seed pearls to as huge as 20mm south sea pearls. The value of a pearl in …