The health benefits of silver

Natural silver ore is usually in the form of lumps and crystal grains, but it may also be in the form of hard dendritic aggregates. The newly unearthed or newly polished silver is particularly bright, shining with silver-white metallic luster; but when exposed to the air, it will quickly produce a layer of black oxide, which will make the surface lose its luster. In addition, the hard and natural silver ore is usually in the form of lumps and crystal grains, but it may also be in the form of hard dendritic aggregates. The newly unearthed or newly polished silver is particularly bright, shining with silver-white metallic luster; but when exposed to the air, it will quickly produce a layer of black oxide, which will make the surface lose its luster. In addition, the hardness itself is not high, and it is not possible to make jewelry in pure form, and it is often co-cast with other metals or covered with gold on the surface. Foreign silver, an alloy of gold and silver, which has been used by people since ancient Greece, only contains 20-25% silver. Standard pure silver contains 92.5%, or higher, pure silver (usually some copper). Both of these alloys are used as the standard to define the silver content. Most silver is a by-product of lead mining, and it is often associated with copper. The world's main silver mining areas are in South America, the United States, Australia and the former Soviet Union. The country with the largest silver yield is Mexico, which has been mining since about 1500. The top-grade natural silver, which is produced in the form of twisted metal filaments, is produced in Kongsburg, Norway. In English, silver is called silver, which means 'white brillianceIn addition, the silver element symbol ag is derived from the Indo-European arg, and is taken from the Latin argentum. French and Italian derived from Latin are called argent and argento respectively. Several basic common sense about silver: 1. Silver is one of the precious metals, the symbol ag, widely circulated among the people, once used as currency in circulation. Silver is silver white, with a relative density of 10.49 and a melting point (961°C). It is easy to smelt, with a hardness of 2.5, strong ductility, insoluble in alkali and most organic acids, easily soluble in nitric acid and hot sulfuric acid, and turns into brown ag2s after being combined with the sulfur dioxide in the air. It has been used to make jewelry since ancient times. Usually set with less expensive gems. 2. The fineness of silver, expressed in thousandths. Pure silver: the silver content is not less than 990‰, and the imprint is pure silver or s990, silver 990. 925 silver: the silver content is not less than 925‰, and the imprint is s925 or silver 925. Since Tiffany launched the first set of silverware containing 925/1000 silver in 1851, 925 silver has become the main force of silver jewelry in the market. Due to the addition of 7.5% copper, the hardness and luster of silver All have improved. 3. Craft silver: Thai silver: silver jewelry processed by the burnt orchid process. Black silver: Cover the silver jewelry with agpbs mixture. After melting, it will form a glassy covering layer, which produces a special black and silver with a sharp texture, a strong color contrast and a relatively increased hardness. 4. Silver's health care effect: Silver has a bactericidal effect, and food with silver tableware is not easy to ferment and turn acid; silver compounds can treat burns and coat wounds; silver chopsticks can detect sulfur-containing poisons in food. Previous: The difference between 925 silver, plain silver, Thai silver, Tibetan silver, and fake silver Next: How to properly maintain silver jewelry