Ways to distinguish the authenticity of silver jewelry:
1. Look at the label
According to the national regulations, the silver content of silver jewelry must be accurately marked. When consumers buy it, it depends on whether there is a purity label S925, Ag925 (fashion is more common) or S99, Ag99 (traditional bracelet child lock) on the jewelry. If it is not marked, it can basically be concluded that it is ordinary metal.
2. Look at the color
The higher the purity of silver, the whiter the silver bracelet will look, and the color of the face file will be fine, even, shiny and polished. If it contains lead, the tide flowers emitted by the face file will have a bluish gray color. If it contains copper, the face file will appear rough and rotten, and it will look dry.
3. Look at the price
At present, the price of silver in Shanghai Gold Exchange is about more than 5 yuan per gram, before adding the purchase cost, process cost and so on. If the price is ridiculously low, it must be insufficient purity or fake.
4. Weighing weight
The density of silver is slightly higher than that of common metals, 1.53g/cm3, so it can be preliminarily judged whether it is silver by weighing it.
5. check the hardness?
The hardness of silver is lower than that of copper, but higher than that of lead and tin. You can use a pin to test the surface of the silver bracelet with a little force. If the needle slips and it is difficult to leave traces on the surface, it can be judged as a copper ornament. If it is made of lead and tin, the trace will be obvious and prominent; If the physical object has traces and is not obvious, it can be preliminarily judged as silver jewelry.
6. verify with acid?
silver will change color and even dissolve in any acid. If a drop of concentrated hydrochloric acid is dropped on the inner side of silver jewelry, white moss-like silver chloride precipitate will be formed immediately. Other precious metals do not have this phenomenon.
7. Listen to the sound
Silver is softer than platinum. If it is dropped on a hard object, the silver bracelet will make a weak sound, while the sound made by other metals is crisp.
Extended information
Benefits of wearing silver ornaments:
1. Sterilization and health care
Silver products have strong bactericidal ability, and silver has medical and health care effects. Silver ions have a strong bactericidal effect and are very beneficial to human body. It is not only of economic value, beautiful and generous, but also can be used as a tool for drug testing. The ancients said that wearing silver will be accompanied by health and wealth, not only because of its precious metal, but also because of its higher efficacy on human health than gold in medicine.
2. Promote wound healing.
It was found that silver can reduce the activity of metalloproteinases. Metalloproteinase (MMP) is a kind of protease, which exists in wounds and can decompose necrotic tissues. Under normal circumstances, MMP is in balance with natural inhibitors and growth factors. The structure of MMP contains sulfhydryl groups, and the activation needs the participation of zinc ions.
In burn or chronic trauma, MMP activity is enhanced. Excessive MMP activity will destroy growth factors and new tissues and hinder wound healing. Silver can combine with sulfhydryl groups in MMP structure or reduce excessive MMP activity by reducing zinc ions on wound surface. It is also reported that silver can increase the amount of calcium on the wound surface, and calcium can speed up epithelial regeneration.
In addition, it is reported in literature that silver can raise white blood cells. Before BC, the ancients knew that silver could accelerate wound healing, prevent infection, purify water quality and preserve freshness. It can prevent the growth of bacteria, calm the five internal organs, calm the mind, stop fright and eliminate evil spirits.
3. Using silver can detect whether food is toxic or not
Because silver can react with many toxins, making silver black and easy to identify with naked eyes. As an ornament, silver is beautiful, fashionable and beautiful. What is important is that it has no radiation side effects on the body. Silver can detect many toxins, which can react chemically to make silver black, and can also react with other heavy metals to detect harmful substances.
So people who are in poor health will turn black if they wear silver jewelry. At present, what science has confirmed is that people wearing silver jewelry turn black, which can only show that people have diseases such as rheumatism, but others can't be tested.
4. The thermal conductivity of silver is the most prominent among all metals.
It can quickly dissipate the heat of blood vessels and quickly reduce the heat of blood vessels, which has excellent curative effect on preventing various diseases. Assuming that the thermal conductivity of silver is 1, that of gold is 53.2, that of iron is 11.6, and that of platinum is 8.2, this distinct thermal conductivity can rapidly reduce the heat of blood vessels and prevent various diseases.
Silver has the function of absorbing toxicity, which is one of the reasons for its discoloration, so it has excellent disinfection performance. This discoloration is only a surface reaction and can be eliminated by toothpaste or medicine. It can be seen that the importance of silver to health cannot be ignored.
5. Compendium of Materia Medica states that silver has the functions of "calming the five internal organs, calming the mind, treating fright, strengthening bones, calming the mind and improving eyesight"
Pure silver bracelet is an expectation, a kind of love and a kind of protection that adults give to children. I hope that children will grow up quickly, be healthy and lively, live a long life, get in and out safely, and so on. The unique cold and clean light of sterling silver jewelry has the wonderful finishing touch, and it shows elegance in silence and grace, which has become the best gift-giving jewelry for the care and blessing of the seniors for thousands of years.