From the current level of people's consumption, the level of consumption continues to increase, and consumers continue to pursue Lantian jade. So how do you identify Lantian jade? The small series of China Jewelry Merchants Network will give you a brief look at Lan Tianyu's identification method.
Shaanxi Lantian jade is one of the earliest historical jade in China. The currently exploited Shaanxi Lantian jade mineral is produced in the marble belt of the Guangping rock group in the Mesoproterozoic, and its formation is formed by the combination of regional metamorphism-contact metamorphism. . The geological and mineralogical characteristics of Shaanxi Lantian jade were systematically studied by modern testing methods. The advantages, history, resources, geographical location and human resources of Shaanxi Lantian jade were analyzed and discussed, and its potential socio-economic value was clarified. And the identification of the following is explained:
1. Characteristics under polarized light microscope: Shaanxi Lantian jade is serpentine petrochemical marble, calcite is mainly granular structure, serpentine is mainly cryptocrystalline structure and scale crystal structure; and serpentine can be seen to form marble. The cryptocrystalline structure also shows minerals such as diopside, olivine and a small amount of muscovite which are well preserved in crystal form.
The results of electron probe show that the chemical composition of Lantian jade in Shaanxi is very close to the theoretical values ​​of calcite and serpentine. The high content is the oxide of Si, Mg and Ca, and the low content is mainly the oxidation of iron. The oxides of aluminum and aluminum are oxides of potassium, sodium, manganese, titanium and chromium, and the content of iron in the serpentine is high.
The X-ray powder diffraction test results show that the main mineral component of the transparent yellow and green parts of Lantian jade in Shaanxi is leaf serpentine, and contains a small amount of calcite, dolomite, etc., similar to Liaoning Xiuyan jade, showing leaf snake The characteristic map of the stone.
4. Infrared absorption spectrum shows that the main mineral components of the transparent yellow and green parts of Lantian jade in Shaanxi have a small amount of diopside in addition to the serpentine.
In summary, it is the method of identifying Lantian jade. I believe everyone knows it. For more details, please pay attention to China Jewelry Merchants.com.
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