But what we usually buy is 925 silver jewelry, not the exchange price, and we have to add some cost. Because the technology is different, the price is different. The recycling value of 925 silver is lower than the exchange price.

1, pure silver, that is, metallic silver with a content close to 100%. Silver is chemically inactive, but because of its special affinity with sulfur, silver sulfide can be slowly generated in the air, making it black and impure. Moreover, in nature, silver is easily mixed with metals such as platinum, so "pure silver" in life generally refers to 99.99% silver or 92.5% 925 pure silver. Due to the characteristics of silver itself, 100% silver ground is very soft and easy to be scratched, which is not suitable for the increasingly sophisticated technological requirements of modern fashion accessories and the increasingly rich and exaggerated modeling requirements. In addition, 100% silver is easy to change color and lose luster. Therefore, in 185 1 year, after Tiffany introduced the first set of silverware containing 92.5% silver, 925 silver quickly became the main force of silverware and became the international standard for identifying whether silverware is pure silver.

2. The main uses of silver are mainly based on three pillars: industry, photography and jewelry and silverware. The total demand of these three types of silver accounts for about 85% of the demand for silver. Since ancient times, silver and gold have been regarded as a symbol of wealth together. The chemical symbol of silver is Ag, which comes from the Latin Argertum, meaning "light color and bright". Because silver is white, it is called "silver". Silver not only has good electrothermal conductivity, but also has high photosensitivity and luminous characteristics, and is used in industry, photography, jewelry, currency manufacturing and so on.

3. Compared with gold, silver was used to make coins more and earlier and entered the circulation field because of its large supply and low value. Many countries have established the silver standard and used silver coins as the mainstream currency. Silver is more active than gold. Although its abundance in the crust is about 15 times that of gold, it rarely exists as a single substance, so it was discovered later than gold. In ancient times, people already knew how to mine silver ore, because the amount of silver obtained at that time was very small, which made its value more expensive than gold. From BC 1780 to BC 1580, the Egyptian code stipulated that the value of silver was twice that of gold. Even in the17th century, the value of Japanese gold and silver was equal. Silver was first used as decorations and tableware, and later used as currency.