The most feared thing when buying jade is buying fakes, so we need to understand some basic identification methods before purchasing. 1. First of all, checking the formal quality inspection certificate is the simplest way to identify. The certificate will clearly indicate: jadeite, A-grade, weight, specific gravity, quality inspection agency, corresponding pictures and other information. If the certificate is marked as Jade (processed), it has been acid-washed, injected with glue, and dyed. You should never buy such goods. Wearing such jade will have adverse effects on your body. A friend of a friend once bought a ruby with a certificate when traveling to Thailand. After returning home, he took it for quality inspection and found that it was a glass product (in fact, it was already marked as a glass product on the certificate, but he didn't look carefully at the time). Therefore, it is very important to know how to read certificates. 2. In the absence of a certificate, we must sharpen our eyes. Natural jade will definitely have many natural characteristics, such as crystal grains, cotton, black spots, yellow jade spots, color roots, surface orange peel effect, etc. What is less easy to understand here is the color root and orange peel effect. Color root refers to the transition between light and dark natural colors in jadeite. The color will not be uniform, and there will be differences in color saturation and chroma. The orange peel effect refers to the fact that due to the uneven surface of jade, the surface of natural jade will look like orange peel under reflected light. The orange peel effect is very common in jadeite of ordinary quality, but if the jadeite is very old, the orange peel effect is basically invisible. You should pay special attention to this. B-grade and C-grade jadeite: You can check whether there are acid-etched patterns on the surface, whether the color is abnormal, whether the color is darker in places with patterns, etc. It is also common in the market to use other jades to impersonate jadeite. The color, specific gravity, refractive index, surface gloss, transparency, etc. of each jade will be different. fcgc66 fcpf18 |
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