On 3rd Jan, 2019, Gold Identification Method
1.Look at it: that is, look at the color. The luster of gold is much brighter than that of copper, iron, tin and other alloys. Experienced people can distinguish true from false by naked eyes or magnifying glasses.
2.Hand-held: Gold is more dense (specific gravity) than ordinary metals and more than twice as dense as copper. There was a distinct heavy feeling in the hand.
3. Listening: Because of the high density and low hardness of gold, the sound of gold thrown on the hard ground is relatively dull. Other metals fall on the ground crisp and have aftertones.
4.Handfeel: Because of the good flexibility of gold jewelry, it is easy to pull or twist with the hand, not easy to break, and easy to recover. For some gold jewelry with good craftsmanship, it is easy to cause damage that is not easy to repair, so caution should be taken.
5.Burning: burning jewelry red and cooling, if it is still yellow, it is gold, if it is discolored or black, it is fake.
6. Looking at the fracture: Gold has good ductility, the gold fracture is flat and dim, no flash, no granular feeling.
7.Specific gravity method: For jewelry that can be completely water-intake, the purity of gold jewelry can be measured by a specific gravity meter.
8.Look at the marking: regular gold jewelry manufacturers should mark according to international standards to show their fineness. According to the marking of jewelry, we can know the manufacturers and the fineness of jewelry.
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