Stability of "Chicken-Blood Jade" (Quartzose Jade) from Guilin: Based on Thermogravimetric Analysis and Infrared Spectroscopy

The "chicken-blood jade" from Guilin is a new type of quartzose jade developed and applied in China in the past 20 years.In this paper, 19 samples of "chicken-blood jade" were collected from Shanglang mining area, Longsheng county, Guilin, Guangxi.And after infrared spectroscopy test, 7 samples were selected to be crushed and ground to 200 mesh powder for thermogravimetric analysis. The test results show that the mineral component of the "chicken-blood jade" from Guilinis mainly α-quartz.The jade is more delicate, with a certain amount of adsorbed water. Some "chicken-blood jade" jewelry from Guilin may exhibit phenomena such as "cotton", lighter colour, and reduced transparency over time during daily wear and storage. which may be related to the dehydration of minerals containing adsorbed water in "chicken-blood jade" from Guilin, leading to a loose structure. However, this phenomenon is reversible.