What does black pearl fortune-telling mean _ What does black pearl fortune-telling mean?

What is a black pearl? How to identify black pearls?

Black pearl is a kind of bronze pearl, which is a precious and valuable variety. It can be said that black pearl represents nobility and is also a symbol of loyal wife after suffering. In addition to natural black pearls with high price and low yield, some faded Japanese nucleated pearls can only be called black pearls if they are dyed black with silver nitrate. Fritillaria producing black pearls is a kind of black butterfly shell, which can secrete black nacre. Only it can produce black pearls with good color.

1, color

Real black pearls generally have no cracks and lesions, and their powder is white, while dyed black pearl powder is black. Dyed black pearls will have cracks and damage. In order to identify the authenticity of black pearls, it is necessary to dip them in 20% dilute nitric acid and rub them with cotton, so that there will be black marks on the dyed black pearl cotton, or take some powder from the perforated pearls with a needle and look at the powder color of the pearls to judge the authenticity.

2. Core

Natural black pearls have no inner core, which is an important feature of black pearls. You can see it clearly with a magnifying glass of 10 times. This is only suitable for pearls with holes. Without holes, it is impossible to identify them by this method. The halo spectrum of fake black pearls is rich and bright, and the mother shell of real black pearls is a black butterfly, which is bigger than the palm of your hand. The particle size of black pearl shall not be less than 9mm. It can be seen that black pearls smaller than 8 mm are mostly colored by radioactive irradiation, that is, fake black pearls.

There are many shapes of black pearls, such as oblate, oval and irregular. In particular, round black pearls are rare, and the price will naturally be particularly high. Natural black pearls are especially precious.