Color identification of precious metal jewelry

Precious metal jewelry quality appraisal is a process of measuring and verifying the precious metal content in precious metal jewelry to ensure that the purity of the jewelry meets national standards or industry regulations. Fineness identification usually involves testing the purity of precious metals such as gold, silver, platinum, and their alloys to ensure that they meet certain quality standards.
precious metal jewelry quality appraisal has a wide range of applications, including but not limited to retail markets, wholesale transactions, jewelry manufacturing, legal appraisals and personal collection verification. This process plays an important role in protecting consumer rights, regulating market transactions, and ensuring the authenticity and value of precious metal jewelry.
In the case of precious metal jewelry quality, Zhongke Testing can provide precious metal jewelry color identification services for 8 metal elements including gold, silver and platinum group metals (ruthenium, rhodium, palladium, osmium, iridium, platinum).

Precious metals mainly refer to 8 metal elements including gold, silver and platinum group metals (ruthenium, rhodium, palladium, osmium, iridium, platinum), among which gold is a relatively common precious metal in the investment market.

GB/T 19267.6-2008 Physical and chemical examination of criminal technical trace evidence Part 6: Scanning electron microscope X-ray spectrometry
GB/T 40114-2021 Jewelry Determination of precious metal content ICP subtraction method
GB/T 18043-2013 Jewelry Determination of precious metal content X-ray fluorescence spectrometry
GB/T 38145-2019 High-content precious metal alloy jewelry Determination of gold, platinum and palladium content ICP subtraction method

was commissioned by a certain public security bureau to conduct identification and analysis of the material of the earrings involved.
analysis results: The
quality analysis expert team cleaned the sample ultrasonically, dried it under an infrared lamp, and then placed it under an X-ray fluorescence spectrometer for non-destructive testing. The following suggestions and conclusions were made: The total weight of the
gold earrings was 3.3365g, and the gold content was 99.6%.