How much loss should be deducted for gold recovery

1. Deducting the loss: it is inevitable that the gold jewelry will be worn after wearing for a long time. Generally, the annual wear rate of gold jewelry is 0.2%
2. Weight deduction: there will also be eight Liang scales in the gold recycling market. Some bad merchants will still use electronic scales, and the error probability of weighing is greater than that of normal gold stores
3. Deduction purity

expansion data:
gold jewelry refers to jewelry made with gold as the main raw material. The chemical symbol of gold is Au, with a specific gravity of 17.4 and a Mohs hardness of 2.5. Gold jewelry can be divided into pure gold and K gold from its gold content

the gold content of pure gold jewelry is more than 99%, up to 99.99%, so it is also known as "nine gold", "ten gold" and "red gold". In order to overcome the disadvantages of gold such as high price, low hardness, single color, easy wear and poor pattern, some other metal elements are usually added to pure gold to increase the hardness of jewelry gold, change its color tone and reduce its melting point. Thus, gold alloy jewelry with different fineness and gold content appears, which is crowned with the word "karat"

the K-gold system is an internationally popular gold measurement standard. The complete expression of K-gold is "karat gold", which gives K-gold an accurate gold content standard, thus forming a series of K-gold jewelry

K-gold jewelry is made by adding other metals (such as silver and copper) to its gold material. It is also known as "open gold" and "good quality gold". Due to the amount of other metals added, different K numbers of K gold jewelry are formed

the size and gold content of K number are as follows:
24K, more than 99%; 22K，91.7%； 21K，87.5%； 18K，75%； 14K，58.5%； 12K，50%； 10K，41.66%； 9K，37.5%； 8K，33.34% ； 6K，25%。

the main units of measurement for measuring the weight of gold are ounce, gram, kilogram (kg), ton, etc. The commonly used gold measurement unit in the world is the ounce. We often see that the world gold price is based on the ounce

for gold traded in the European and American gold markets, the gold trading unit of measurement is the troy ounce, which is different from the troy ounce, which is the daily unit of measurement in Europe and America

the troy ounce is a unit of measurement specially used for the trading of precious metal commodities such as gold, and its conversion is as follows:
1 troy ounce = 1.0971428 troy ounce = 31.1034768 g
1 troy ounce = 28.3495 g

in China, it is generally used to use gram as the unit of measurement of gold. Although the metric system is adopted in China, the unit of measurement of gold in China is different from the customary unit of measurement "ounce" agreed in the international market, Domestic investors investing in gold must first get used to this difference in measurement units

purity measurement
the purity of gold and its products is called "fineness". There are two kinds of fineness marks of gold products in the market: one is percentage, such as g999; The other is K gold, such as g24k, g22k and g18k. In China, there are regulations on the marking and signboard of gold products. Generally, the manufacturer's code, material name, content mark, etc. are required. If there is no mark, it is a non-conforming product. This is also true internationally. However, it is also allowed not to mark some particularly small products