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Gold identification method

Release date:2018-12-21  source:中南选矿网  Browse times:65
Core Tips: First, look at it: 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 and false from the color through the naked eye or 10 times magnifying glass. Second, handcuffs: yellow

First, see: 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 and false from the color through the naked eye or 10 times magnifying glass. Second, handcuffs: gold is larger than the general metal density (specific gravity), more than twice as much as copper. There is a clear feeling of heavyness in the hand. Third, listening to the sound: Because the gold density is high, the hardness is low, and the gold is thrown on the hard ground, the sound is rather dull, and the other metals are crisp and have a residual sound. Fourth, the feel: Because the gold jewelry is flexible, the hand is easy to pull or twist, not easy to break, and easy to recover, for some craftsmanship gold jewelry is easy to cause damage that is not easy to repair, should be used with caution. 5. Fire: Cool the jewelry after burning it. If it is still yellow, it is gold. If it changes color or turns black, it is fake. Sixth, look at the fracture: gold is good for extension, the gold breaks the mouth flat and dim, no flash, no graininess. 7. Gravity method: For jewelry that can be completely infused, the pycnometer can be used to measure the purity of gold jewelry. Eight, look at the mark: regular gold jewelry manufacturers, must be marked according to international standards to indicate the color, according to the jewelry mark can understand the jewelry manufacturers and color

 
 
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