Pearl Pearl is an ancient organic gemstone produced in pearl shellfish and mother-of-pearl mollusks. The calcium carbonate-containing mineral (aragonite) beads produced by endocrine function are composed of a large number of tiny aragonite crystals. Made of. According to studies in geology and archaeology, pearls have been found on Earth 200 million years ago. The international gem world also listed pearls as the lucky stone of the birth of June, the memorial stone of the thirteenth anniversary and the 30th anniversary of marriage. Pearls with magnificent colors and elegant temperament symbolize health, purity, wealth and happiness, and have been loved by people since ancient times. In 2006, a typhoon was named "Pearl."
Pearl identification method one:
1. The pearls are in various shapes, with natural iridescent pearls and metallic luster reflections, so each pearl has a different gloss. The artificial beads are neatly shaped and the pearls are dim.
2. The pearls rub against each other and have a sensation of sensation. The fake beads have a smooth feel after rubbing against each other, and the fake beads and the glass also have a smooth feel.
3. The pearl touches the skin with a cool feeling, and the mouth is sighed to the pearl, and the surface will appear as a mist. The fake beads touch the skin with a smooth, warm feeling.
4. The pearl is burnt with a small fire, the appearance will turn black (smoke), the brilliance will remain the same, the fire will burn, and there will be a popping sound. The natural pearl will burst stronger than the cultured pearl. The lobes are countless thin curved small pieces, silver. Gray, with a colorful luster, the periphery is translucent. The shape of the artificial beads is uniform and uniform, burnt with fire, and has a plastic smell. The ash is flat or broken, and the color is black and dull.
5. Put the pearl in the banana water for a few minutes, shake it, and the brilliance does not decrease. The fakes are shaken slightly in the banana water. The surface gloss is completely detached in a few minutes. The remaining beads are milky white, milky yellow or clean white, translucent, dull, some with fine parallel texture, and some visible concaves. Point or round hole.
6. Pearls of similar weight fall freely from the height of 60 cm on the glass plate. The height of the sea pearls can reach 15-25 cm, and the freshwater pearls can reach 5-10 cm. The fake product is free to fall on the glass plate because of the addition of the coating layer, and the jump height is low.
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Pearl identification method two:
1. Inferior quality is small, the shape is not round, rough, dull, lacking layering after fracture, thin nacre, large kernel, quality.
2. Common fakes of fakes are:
The fake Xingang Pearl is the same size as the pearl, with a white surface and a few small depressions. It has a metallic luster and is dull and radiant. It is made by manual processing, and the pearl layer is a toxic lead compound. Burning on the fire, the surface gloss immediately turns grayish black.
Most of the processed mother-of-pearl products are round and oblate, and the particle size is relatively uniform. It is about 2 to 4 mm in diameter and has a white surface and a metallic luster. When crushed or fired, it can be seen that the section shows a layer of micro-tiling, but there is no concentric layering.
Shells, calcite and other processed products are mostly flat drum, short cylindrical, irregular multi-faceted or nearly spherical, one or both sides are flat, different in size, the surface is white or yellowish white, slightly rough, slightly pearlescent. The burn does not burst, the surface is grayish black, and the embers are flat or blocky.
Pseudo-pears process foreign bodies into larger round grains and inoculate them in pearl oysters. After a short period of time, the surface of the foreign objects is wrapped around the nacre to form a so-called large and smooth "pearl." The shape is similar to that of natural pearls, but the surface gloss is weak. There are round sand or stone cassia in the center of the section, and there is a thin layer of nacre on the surface.
3. Imitation products generally use glass and plastic as raw materials, and as craft pearl products, they rarely enter the medicinal market.
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