How to distinguish between black pearls and dyed black pearl?
Meilanxuan
fashionjewelryfactory.com
2018-01-22 16:39:38
1. With a magnifying glass 10 times to observe whether the surface of the pearl drill or a small pin point. No holes are mostly natural black pearls, if there is a hole, then there may be dyed pearls. The same token, the number of small needle point is to determine whether it is really black pearls.Meilanxuan create beauty for every woman through Jewelry design supplier china.
2. observe the hole or pinhole there is no blue dye concentration, if any, is the dyed black pearl. The reverse is true black pearl.
3. Polarized microscope to observe, natural pearls or cultured black pearl color is not too uniform, and this point can be seen with this microscope.
4. Take the pearl off with an infrared negative, and if it is dyed black pearl then the picture is rendered in yellow or turquoise, whereas the true black pearl generally shows a light blue color.
5. Test its fluorescence. This aspect is generally true that black pearls in the purple light irradiation looks like the color is bright red to brown between the most of the black pearls do not have such a reaction, there is little or will be a little panic Green fluorescent.We Melanxuan Fashion necklaces for women would be an excellent choice because they add the perfect life experience to your outfit.
2. observe the hole or pinhole there is no blue dye concentration, if any, is the dyed black pearl. The reverse is true black pearl.
3. Polarized microscope to observe, natural pearls or cultured black pearl color is not too uniform, and this point can be seen with this microscope.
4. Take the pearl off with an infrared negative, and if it is dyed black pearl then the picture is rendered in yellow or turquoise, whereas the true black pearl generally shows a light blue color.
5. Test its fluorescence. This aspect is generally true that black pearls in the purple light irradiation looks like the color is bright red to brown between the most of the black pearls do not have such a reaction, there is little or will be a little panic Green fluorescent.We Melanxuan Fashion necklaces for women would be an excellent choice because they add the perfect life experience to your outfit.
6. beat X-ray. Photographs taken with X-rays are also black pearls that can be judged as true black pearls or dyed. Dyed black pearl generally bead between beads and beads will have a gray shadow. Not only that, X-ray photos can also be seen pearl thickness, nacre thickness is at least 1mm above, the more thick then its value is higher.Meilanxuan Woman's necessities, provide OEM Copper alloy jewelry supplier.