In recent years, various jewellery frauds have appeared in the antiques market across the country, deceiving collectors and consumers, making it impossible to prevent. According to industry insiders, these fake tricks are mostly from the jewelry and jade market in Guangzhou. Here, relevant experts visited and summarized.
A colorless gemstone or a lighter gemstone is soaked in a colored solution to precipitate a pigment on the surface of the gemstone to change the color of the gem itself. This treatment method was originally mainly used on porous and multi-cracked jade. Now it is mainly used in crystal shamming, that is, the colorless or light-colored crystal is soaked in a yellow or purple solution to resemble citrine and amethyst. In addition, the market also uses a purple-red pen to paint the imitation of violet on the surface of the colorless bracelet. This method of identification is relatively simple, as long as you pay attention, you will not let it go.
Colorless gemstones or lighter colored gemstones are colored with colored ropes, mainly for citrine, amethyst, aquamarine, topaz and the like. Strictly speaking, this is not a treatment method, because it does not deal with the gem itself, but this method is easy for the first-time entrant to miss the price judgment.
Fish eye mixing method
Mix other cheaper gemstones such as glass, synthetic gemstones, and treated gemstones into a chain of beads. Such as citrine mixed glass, natural crystal mixed with synthetic crystal, tourmaline mixed crystal, jade mixed with jade and so on.
Polishing powder coloring
More green polishing powder remains on the inner and outer surfaces of the colorless or light jade bracelet to change the color of the bracelet itself. This method was popular in the market a few years ago. It was cold for a while and it is now on fire. It has been found that this method is used for the imitation of oil and green jade. In the inspection, special attention should be paid to the jade bracelet with uniform color and blue color.
In the jewelry market in Guangzhou, the coating method is mainly applied in the following aspects: 1. The garnet coating method is coated with a film with a metallic luster on the surface of the red garnet, and the light transmission is reddish. The industry is called â€œred blood stoneâ€. ". 2. The crystal coating method is used to plate the metal luster film on the surface of the crystal cluster for "Rainbow Stone" sales. 3. Amber coating A reddish film is applied to the bottom of the yellow amber to improve the appearance of the amber. 4. Glass coating method is used for making jewelry. 5. The coated zebra amaryl coating is mainly used to protect the zebra daisy raw materials. Because the zebra daisy has a layered structure, if it is not protected, the surface layer is easy to fall off.
In the Guangzhou jewelry market, the main application is in landscape crystal, watermelon tourmaline and diffusion processing star sapphire. The detection method is mainly to find the bubbles of the split line and the split surface.
Artificial "night pearl"
Use a kind of artificial luminous material containing enamel to imitation pearls. This artificial luminous material is yellow-green in the early days, and the latest products on the market are dark green, with strong yellow-green phosphorescence in the dark, in the form of fine materials. X-ray fluorescence analysis showed strontium and zinc peaks.
Mainly used in topaz, lemon yellow crystal, colored diamonds and black diamonds, the gemstones treated by this method are difficult to identify by conventional detection methods.
Jade bracelet coating method
In addition to traditional treatment methods such as bleaching, injection molding, dyeing, and re-creation, the treatment of jade has recently had a new trend, namely the jade bracelet coating method.
Unlike the traditional "dressing" jade, which is mainly applied to the ring, this method is mainly applied to the bracelet, and the surface of a part of the bracelet is coated. The film is colorless or partially colorless and partially colored. The colored part is not used. Ordinary dyes are fine-grained green jade raw materials. Because this method is not sour bubble, the dye used is also natural, so it is extremely deceptive. Its main purpose is to fill the gaps in the bracelet or change the color of the bracelet. The earliest appearance of this bracelet has more bubbles on the surface, which is more sturdy and has a poor gloss. Recently, this treatment method has been improved, and the surface is basically difficult to find bubbles, and the gloss is also good. Of course, this method is easily identified by conventional detection methods.
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