What color is in the black pearl?

Question 1: Is the black pearl black inside and outside? If you break a pearl, what color is it? The color of natural black pearls is gradual, decreasing from the outside to the inside. The color is uneven. If it's a synthetic or processed pearl, it's just black outside and white inside, but it's covered with a black film. hope this helps

Question 2: Is the black pearl white inside? First of all, black pearls are the unique color of seawater pearls, but freshwater pearls are not.

Secondly, if it is really a black pearl, its interior should also be black.

So here, I also teach the landlord how to identify the authenticity of pearls:

Take a piece of glass or mirror and grind pearls on it. If it is true, pearl powder can be ground, and no matter what color of pearls, the ground powder should be white, otherwise it is fake.

Then fake pearls can't be worn out generally, and only the plastic layer on the surface can be worn off at most.

Question 3: What color is the natural black pearl? Fritillaria nigra is a kind of black butterfly that secretes black nacre. The beauty of black pearl lies in its natural black tone and various colorful colors, among which the most appreciated are malachite green, deep purple, navy and other rainbow colors. Its strong metallic luster will change with the rotation of the pearl, which is incomparable to other color-changing pearls.

The characteristics of high-quality pure black pearls include:

1, the pearl surface is particularly smooth.

2. pearls feel sticky.

3. It's hard to see the edge of the laminated nacre, but you can see sharp instruments and concave colorless covering.

So don't be confused when you see pure black pearls in the future.

Question 4: What is dyed black pearl? How to identify? X-ray irradiation-pearls are blackened by gamma rays emitted by cobalt sources. Dyed pearl nucleus-The pearl nucleus turns black before it is implanted into the pearl shell. When the pearl is formed, the black pearl core makes the translucent pearl look black. Coating-coating a thin layer of black colloid on the pearl surface. It is easier said than done, and it is not difficult to say. You should know there is a close relationship. Color-Black pearls have different shades of light gray to black, and its beauty lies in the color matching on the appearance tone. Turn the black pearl slowly, and you can see the slight rainbow-like flash changing constantly. No two pearls are exactly the same. If you see a string (or even several strings) of black pearls with uniform and dull colors and rich halos, it is almost certain to be dyed pearls. Dyed pearls and black are concentrated in holes and defects, and the color is very dark. This is easy to observe under a magnifying glass of ten times. Shape-whether the black pearls you see are particularly round, and the black pearls with fine circles are extremely rare and of high value. Typical black pearls are oblate, pear-shaped, oval and irregular, and many of them have flaws or rings, so the super-value black pearls you see are very smooth and round. Probably dyed. Size-The diameter of seawater pearls in China or Japan is usually less than 9mm, while the diameter of black pearls is at least 8mm, so round black pearls smaller than 8mm are mostly dyed pearls. Price-Are the black pearls you see surprisingly cheap? An 8mm round black pearl costs more than 1000 yuan, while a dyed pearl of the same size is only worth 1200 yuan. If you are lucky enough to buy a black pearl at a reasonable price, Jinji requires the merchant to indicate on the receipt that the color of the pearl is natural. If you want to buy an expensive black pearl, the above identification method is still not reliable. Consider taking it to a jewelry appraisal unit for an exact identification: ultraviolet fluorescence test-under ultraviolet irradiation, black pearls often fluoresce, ranging in color from bright red to coffee red, but most dyed pearls do not respond to ultraviolet rays or show dim green fluorescence. X-ray test-the film irradiated by X-ray can show the dyed pearls treated with silver salt, and a circle of pale white appears between the pearl layer and the pearl core of the dyed pearls, which proves its dyeing composition. X-ray fluorescence detection-pearls will emit radiation with a specific wavelength under X-ray irradiation, and the chemical composition and the existence of silver salts can be detected by measuring the wavelength with a spectral measuring instrument. Infrared photography test-shooting pearls with infrared film. The image of black pearl is light blue, while the image of dyed pearl treated with silver salt is yellow, or blue-green to yellow-green. None of the above methods will damage pearls. At the same time, we do not recommend using destructive testing methods such as scraping powder or wiping with dilute acid. It's the same old saying: find a reputable professional.

Question 5: What is dyed black pearl? How to identify? Black pearls in Tahiti are mysterious and rare. The annual output of high-quality black pearls is less than 1.5 million. Every 1.000 black butterflies can only produce about 30 pearls, of which only one or two can become perfect products. Precious and rare black pearls are very popular in the jewelry industry, so dyed black pearls appear in the market. Ordinary pearls are usually dyed black or radiated black to imitate black pearls.

So how to tell the difference between natural Tahiti black pearls and dyed black pearls?

At present, there are many imitation Tahiti black pearls on the market, and the most common one is dyed with freshwater pearls. For ordinary consumers who don't know much about Tahiti black pearls, this kind of dyed pearls can easily get away with it and deceive consumers with low prices as bait. So how can we guarantee to buy a genuine Tahiti black pearl necklace?

The following simple methods can be used to distinguish natural black pearls from dyed black pearls:

1, color-Black pearl is not pure black, its color is light gray, malachite green to black, and its beauty lies in the companion color in the look tone. Turn the black pearl slowly, and you can see the subtle change of halo color. No two pearls are exactly the same. If you see a string (or even a few strings) of black pearls with the same depth and bright colors, you can almost be sure that they are dyed pearls. After dyeing, the color of the beads is dim, and the black color gathered in the holes and defects is deep, which is easy to observe under a magnifying glass of ten times.

2, shape-round black pearls are extremely rare and extremely valuable. Typical black pearls are oblate, pear-shaped, oval and irregular, and many of them have flaws or rings, so if the "super-value black pearls" you see are smooth and round, they are probably dyed.

3. Size-The diameter of seawater pearls in China or Japan is usually less than 9 mm, while the diameter of black pearls is at least 8 to 9 mm, so round black pearls smaller than 8 mm are mostly dyed pearls.

4. Price-An 8 mm round black pearl usually costs more than 1000 yuan, while a dyed pearl of the same size only costs one or two hundred yuan.

6. Identification-Go to an authoritative professional jewelry testing center for identification.

None of the above methods will damage pearls. At the same time, we do not recommend using destructive testing methods such as scraping powder or wiping with dilute acid. Finally, I would like to remind you that you must find a reputable professional pearl dealer to buy precious jewelry.

Question 6: Why do black pearls lose their skins? The color inside is different from the color outside. See if your picture is a real pearl. The formation process of real black pearl is that the mantle of mother-of-pearl is affected by foreign matter, and then the epidermal cells affected by foreign matter are trapped in the connective tissue of the mantle, and then the epidermal cells of the mantle form pearl sacs, which secrete nacre and wrap the pearl nucleus layer by layer. If the innermost core may be a foreign body of other colors, but it can't be changed into a different color through a small layer like your picture, then yours may not be a real pearl. Black pearls are rare and expensive, so it is better to choose some big brands to buy black pearls.

Question 7: What color is the core of the black pearl? Nanyang Pearl and Tahiti Black Pearl have cores, and Japanese pearls and China seawater pearls also have cores. At present, some large freshwater pearls have nuclei, and those with diameters below 1 1mm basically have nuclei.

The core of a black pearl is also black.

Question 8: Is the black pearl white, fake? Two situations:

The first type: dyed with freshwater pearls, the color is white after losing;

Second, the black pearl is also white under the epidermis, because it is calcium, and the color of the black part is about 1 mm thick.

With reference to the above information, it can be judged whether it is dyed or natural.

Question 9: What color are the black pearls in Tahiti? Real Tahiti pearls are rarely all black. Generally, it is translucent green, translucent blue, translucent purple and even metallic silver gray. Color mainly depends on personal preference, and generally green or some special luster is more popular.

Question 10: Why do black pearls peel off? The color inside is different from the color outside. The formation process of true black pearls is that the mantle of mother-of-pearl is influenced by foreign substances, and then the epidermal cells affected by foreign substances fall into the connective tissue of the mantle as the core. Then the epidermal cells of the mantle form pearl sacs, secrete nacre, and wrap the nucleus layer by layer to form pearls. If the innermost core may be a foreign body of other colors, but it is impossible to polish off a layer of pearl powder lightly, it will be of other colors, so in your case, it is very likely that your pearl is not really a black pearl. Black pearls are rare and expensive, so it is better to choose some big brands to buy black pearls.