The Guidelines for Identifying Fake Pearls or Pearl Imitation
Help people to choose their favorite real pearl necklaces or real nature pearl earrings
Due to the popularity of pearls among women nowadays, also we want to buy a piece of real freshwater pearl earrings or real akoya pearl earrings but the formation of real pearls takes a long period, moreover the gradual decrease of natural pearls, the development of pearl breeding industry was stimulated, and many pearl imitations appeared. Therefore it is difficult to buy the real pearl jewelries if you want to buy some real akoya pearl necklace or real freshwater pearl necklace.
At present, the pearl imitation that often appears on the market is to grind in the shape of ball with pearl shell, then coated with pearl powder or with some vacuum treatment on its surface. Most of the surface layers of these beads are not genuine pearl powder, but rather "chemical substitutes". Illegal profiteers often claim that these craft pearls are made of natural pearl powder, which is better than the real pearls. Others call this kind of shell "south sea pearls".
From the formation process of fake pearls and the production process of craft pearls, we can know that although the nuclei are similar, they are actually different. Cultured pearls is a long growth cycle and beneficial to human body. And craft bead is pure "craft" product, It can be mass produced, the difference between the two kinds of pearls' prices is tens or even thousands of times.
But how to distinguish the real pearls from fake pearls, we can discriminate them from the following aspects.
First of all, fake pearls are coated with artificial powder on the nucleus of pearls. Their surface is often thin and easy to occur "peeling". Natural or human cultured beads do not normally occurs.
Secondly, although the luster of fake pearls is bright, it seems too monotonous, but not the luster of real pearl necklace or earrings, no matter it is the real akoya pearls or real freshwater pearl necklace.
Thirdly, because the shell beads are of low value, the polishing of shell beads is often inadequate when they are used as nuclei. Some nuclei often retain some straight small planes, which are too thin and uniform to fill these planes to form an arc surface after being coated on the artificial pearl powder. Therefore, small planes are often found on the beads. Natural pearls do not have such a plane. Artificial pearl culture lasts a long time and does not have such a plane.
Fourth, the quality of the natural pearls and cultured pearls surface often have some small convex, but the surface of the pseudo-pearl is often smooth.
Fifth, if you bite the real pearl gently with your teeth, it will feels sandy, and the fake pearl is often the feeling of rolling smooth. In addition, real pearls feel cold while fake pearls are often warm and greasy. Based on the above characteristics, it is generally possible to separate real pearls from fake pearls.
But it is worth mentioning that there is a creature from scales of guanine crystals for filling wax pseudo glass beads made of dozens of times, it is very similar to real pearl, also has the high luster, smooth, but the surface of the pearl skin usually with homogeneity under the Polariscope, while natural or cultured pearls for nature to distinguish between heterogeneity, etc.
Particular care should be taken with regard to some pearls dyed or radiochemically modified. For example, some black pearls are processed in these two ways. The way to distinguish natural black pearls from artificially dyed pearls is to wipe them with cotton balls dipped in dilute nitric acid where the pearls are not conspicuous. If the black pearl is treated with silver salt, the cotton ball will turn black. But this is a destructive method and should be careful when using. The inspection of black pearls including false black freshwater pearls, Tahitian pearls and black Akoya pearls, which are colored by radiation, is not easy, and sometimes a spectral fluorescence camera is needed to distinguish them. It is thought that if the black pearl is less than 8CM in size and has a color of gray and green and blue, it is mostly AKAYA beads with radiation coloring or dyeing.