Gold levels and silver levels

Gold levels
The unit of content is rust. Rust is the smallest unit of weight when it is traded precious metals and precious stones. Pure gold is said to have 24 carat content and is usually stored in the form of bars or called gold ingots. 1 gram is 5 carats but after being a jeweler, gold is always labeled with eg 10 grams of 18 carats. In the world of gold jewelry is often sold with levels of 9 carats, 16 carats, 18 carats and 22 carats. In Indonesia generally 18K and 22K. K shows stamp or stamp on gold jewelry that indicates the gold content in question. 18K means the gold you buy from gold jewelry trades has a content of 75% of 24 carats. Or 18: 24x100% = 75% in the world of commerce or between merchants often referred to as 750. Usually traders ngitungnya 3 numbers behind the comma. Because the difference of 0.055 grams only if the price of Rp.140,000 / gram is the same as the cost of more than 1 pair of gems. This means that in 18K
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gold there is 25% of other mixtures, this mixture is called alloy. Usually the alloy is a mixture of pure brass, pure copper, pure silver, pure zinc and other mixtures according to the secrets of each factory that produces it.

Silver Level
Silver jewelry in the world of commerce is often distamp or 925 stamp. There are others that are 800 and usually without K behind 925. This 925 figure shows 92.5% of 100% pure content. Usually pure silver is 99.99%. Not 100%. Raw materials are usually stored in the form of seeds called klicir or granulation. Why are not jewelry made purely? If it is pure, silver or gold is easily dented and quickly scratched or dull. Less loud. The mix made this hard and cling the secret of each factory. Jewelry let remain luster or cling but hard.