1, s or SL, for example:
The silver content of 92.5% was identified as S925 and SL925.
2. Because the English name of Silver is Silver, the chemical elements are expressed as Ag. Therefore, the color addition of Ag can also be used as a sign. For example:
Ag925 or 925.
3. Zuyin and Qianzu Yinduo directly carved Chinese characters, and there were also signs such as s990, s999, Ag990 and Ag990.
4. If there is no "S" before the sign, the sign is Ag, or the Chinese characters are engraved with silver and silver, it can also be considered as meeting the standard.
Extended data:
"999" stands for a thousand feet of silver. The color of 999 silver is pale and soft, so the jewelry made of it is easy to deform and cannot be inlaid with gems.
"99" stands for foot silver, with a silver content of 99%, and the jewelry is marked as S990.
"925" silver contains 92.5% silver and 7.5% copper, and the jewelry is marked as 925. Most of our common silver ornaments are made of 925 silver. After polishing, 925 silver jewelry presents a very beautiful metallic luster, but also has a certain hardness, which can be inlaid with gems and made into high-grade jewelry.
925 pure silver contains 925%(92.5%) silver, which is different from traditional pure silver. In order to strengthen the hardness of silver ornaments, about 7.5% copper is added, so the silver color of 925 silver will appear gray instead of the silver color of traditional silver.
925 silver is generally called standard silver and marked as "S925" or "Ag925". Because some other metals are added, it is not easy to deform and has enough brightness, so it will not turn black, but it cannot be reproduced. Common in fashion necklaces, rings, bracelets, earrings, etc.
990 silver is generally called pure silver and marked as "S990" or "Ag990". Its texture is soft, and rings and necklaces made of it are easy to deform or break, and also easy to turn black. The advantage is that it can be done again if it is broken. Common in traditional jewelry, bracelets, life locks and so on.
The identification methods of silver jewelry mainly include:
1, look at the color
The higher the purity, the whiter the silver, and the surface of jewelry looks even, shiny and polished. If it contains lead, the jewelry will appear bluish gray; If it contains copper, the surface of jewelry will be rough and the color will not be moist.
Step 2 consider
The density of silver is slightly higher than that of ordinary metals. Generally speaking, "aluminum is light, silver is heavy, and copper is not light or heavy." Therefore, it can be preliminarily judged whether it is silver by weighing. If the jewelry is large and light, it can be preliminarily judged that the jewelry belongs to other metals.
3, check the hardness
The hardness of silver is lower than that of copper, but higher than that of lead and tin, so it can be tested by marking jewelry in an inconspicuous place with a pin. If the needle slips, it is difficult to leave traces on the surface, which can be judged as copper jewelry; If it is made of lead and tin, the trace is obvious; If the object has traces but is not obvious, it can be preliminarily judged as silver jewelry.
4. Listen to this poem
Hit the ground, sterling silver jewelry, no elasticity, the sound is "bam bam". The lower the color, the lower the sound, and the sharper and higher the rhyming sound; If it is made of copper, its sound is high and sharp, and its rhyme is short and short; If it is made of lead and tin, the sound of falling to the ground is dull, short and inelastic.
References:
Baidu encyclopedia-sterling silver jewelry