Experts reminded that for the purchase of jade, the following points are mainly followed: First, determine the true and false of jade, and secondly determine whether jade is treated, and finally determine the quality of jade. The following are introduced separately:
1. Is jade treated?
Treatment of jade is commonly carried out by injection molding (B goods) and dyeing treatment (C goods). The jadeite injected with glue is made of resin, so the gloss is often resin luster, waxy luster, grease luster, due to serious acid solution. Soaked, the surface is orange peel structure, mesh structure, the overall appearance of the color is a shallow yellow tone. The most accurate method of identification is to use an infrared detector. The color of the jadeite dyed is colorless, often floating on the surface, through the light, the common green is filamentous, often detected by means of a spectrometer.
B goods jade is filled with resin, the time is long, the resin is aging, the surface gloss of jade will be worse, the transparency may change, the color will also change slightly, the color of C jade will change with time, the color may fade. Therefore, the purchase of A cargo jade is the first choice. According to national standards, untreated jadeite should be marked with “Jadeiteâ€, and glued and dyed jadeite should be marked with “Jadeite (handling)â€, and other standard methods are incorrect.
The above true and false and dealing with jade, even professionals are sometimes difficult to distinguish them with the naked eye, and ultimately through the instrument, so at the time of purchase to the big shopping malls, the high price can ask for the certificate issued by the inspection station, In small shopping malls, especially the shopping places of many tourist attractions, shoddy, the phenomenon of fake realism is particularly common, hundreds of dollars of B goods jade bracelets often marked thousands of dollars. The price of treated and untreated jade is very different, and the treated jade looks more beautiful than untreated, so be careful when buying.
Second, the quality of jade is good or bad
Good jade is based on the following criteria: color - the greener the better, the more uniform the better; the head - the better the better; the structure - the finer the better; the stone flower, the spot, the crack - the less the Good; craft - the finer the better; the more beautiful - the better the image
Third, the true and false of jade
There are many jade similar to jade. The common varieties on the market include Aoyu, Malay jade, green Dongling jade, tumbler, Dushan jade, jade jade, water calcium aluminum garnet, glass and so on.
1. Dushan jade
Dushan jade is a kind of plagioclase produced in the Dushan of Henan Province in China. The color is mainly white and green, the green is often blue-green, the distribution is very uneven, and the green color is red under the Charles mirror.
2, Saitama
Xiyu is a serpentine jade produced in Xiuyan, Liaoning. The green color is mainly yellow-green. The surface is oily and lustrous. The hardness is low. It can be infused with a general knife, and jadeite cannot be inscribed.
3, water calcium aluminum garnet
Calcium aluminum garnet is a kind of garnet, granular structure, uneven color, often dark green or black spots, red under the Charles filter, Qinghai Cuihai, China, called Tesavo Jade, South Africa The production is called South African jade.
4, glass
Glass is an artificial product commonly used to imitate various kinds of gemstones. It is opaque to translucent, sometimes visible bubbles, shell-like fractures, density lower than jade, light touch, uniform color, and false.
5, Australian jade
Oasis refers to a kind of green chalcedony produced in Australia. It is a cryptocrystalline quartz, translucent and green. It is often made into a ring face, which is very similar to high-grade jade. It is easy to use with jade according to its density and refractive index. Differentiate.
6, Malay jade
Malay jade is a kind of quartzite dyed in green, translucent and green. Because it is dyed, the green dye is visible in the quartzite through the visible light.
7, green Dongling jade
Green Dongling jade is a quartzite containing chrome mica. There are green flaky chrome mica between the quartz particles, so the flaky flash is visible against the light.
8, the tumbler
The tumbler is a hard sodium jade produced in Myanmar. It is bright green, opaque and has a lower refractive index than jade.
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