best fashion jewelry wholesale What is China's Gold A2549?

wholesale jewelry catalogs free The code of gold is AU. National Standard GB11887-89 stipulates that each opening (abbreviation of English Carat and German Karat, often writing "K") has a gold content of 4.166%. 4.166%= 33.328%(333 ‰) 10k = 10*4.166%= 41.660%(417 ‰) 14k = 14*4.166%= 58.324%(583 ‰) 20K = 20*4.166%= 83.320%(833 ‰) 24K = 24K = 24*4.166%= 99.984%(999 ‰) 24K gold is considered a pure gold and became "1000 ‰", but the actual gold content was 99.99%, and it was 23.988k. Use text to express the purity of gold. Some gold jewelry has a text mark on the jewelry. Silver, copper, iron, tadpoles, tadpoles, platinum, nickel, nickel, sannal, selenium, and 锇 锇 银 银 银 银 银 contains 15%of silver in silver gold ore, more than 20%of copper contains copper gold ore, 钯 银 银 银 银 银5-11%of the people are called 、 者 者 and more than 4%of 铋 铋 5 铋 铋 矿 矿. Gold has a pro -sulfur, often close to sulfide such as pyrine, poison sand, square lead ore, and 锑 锑 ore; it is easy to form metal mutual alternatives with sulfur and copper elements. The following is the chemical equations of the gold. The more pure chlorine and fluorine gas oxidation (the condition must be heated) 2AU 3Cl2 = 2AUCL32AU 3F2 = 2AUF3
a is the symbol of the foot gold, and the A2549 encoding is not a sign of gold.
a gold conventional refers to the gold jewelery with the theoretical purity of 100%. According to the level, gold can be divided into red gold, color gold, mixed color gold, K gold, etc. The red gold is equivalent to pure gold, which refers to gold with a gold content of not less than 99.6%, and K gold is more common in the market. The more popular varieties are rich in color and stable in nature.
The standards of Chinese standards are AU9999, AU9995, AU999, AU995. The specifications are 50 grams, 100 grams, 1 kg, 3 kg, 12.5 kg.
The S925 above gold means 92.5%of the gold content. The gold content refers to the content (quality) of the metal "gold" of gold jewelry and gold products. It is represented by K, and the common 18K gold content is 75 (%). One of the characteristics of gold is soft, so it is difficult to inlaid all kinds of exquisite styles, especially when it is inlaid with treasures such as pearls, gems and emeralds. Therefore, people add a small amount of silver, copper, zinc and other metals to gold to increase the strength and toughness of gold. The gold jewelry made, also known as K gold.