The buying of gold should be bought with gold. The residence is located. But how to check your gold requires specialized expertise. The way to see the gold.
1.See from the outside by a balance weight of gold with the size of the line.
2.Burn you can check that percent Is gold. The observation of the fire burn. If burned then the chain is green or black that have other additives that contain and low percent.
3.Check percent of gold with the X-ray. This method does not damage the product and know what it contains. The accuracy depends on the performance of the machine.
4.Specific Gravity this approach requires the molten gold then find that the specific gravity as how much percent of gold.
5.Frie Assay be check the gold by this method is an error in the detection of as little possible.
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