The purity standards and characteristics of pure gold jewelry
Purity standard
The purity of pure gold jewelry is centered on the gold content. According to national standards, the gold content of pure gold should reach 99% or above, that is, the purity per thousand fraction should not be less than 990‰. In the actual market, the purity of pure gold jewelry is usually higher, commonly reaching 995‰. Since 2016, the national standard has abolished the independent naming of "999‰ pure gold" and uniformly labeled it as "pure gold". However, consumers can still choose products of different purities based on their actual needs. In addition, there are relevant analytical method standards for high-purity gold jewelry (such as gold content ≥99.99% or ≥99.999%), but ordinary pure gold jewelry still takes 99% as the benchmark.
Characteristic Analysis
High purity and value preservation
Pure gold has a gold content close to 100% and has extremely high value preservation. It has stable chemical properties, is not easily oxidized or corroded, and can maintain its luster and texture for a long time, making it an ideal choice for investment and collection.
It is soft in texture and prone to deformation
Pure gold is soft in texture and highly malleable. One gram of gold can be stretched into one square meter of gold foil, or 0.5 grams of gold can be drawn into 160 meters of gold wire. This feature makes it suitable for making fine jewelry, but it also leads to the jewelry being prone to deformation or wear due to external forces. When wearing it, avoid squeezing and colliding.
Color and process limitations
Pure gold has a reddish yellow color. The higher the purity, the more golden and bright the color. However, its softness limits the application of complex craftsmanship, making it difficult to create finely inlaid or three-dimensional structured ornaments, and traditional styles are mostly used.
Durability and maintenance requirements
Although pure gold jewelry is resistant to corrosion, it needs regular maintenance to keep its luster. When wearing, avoid contact with chemical substances (such as perfume and cleaning agents). When storing, keep it separately to prevent scratches.