wholesale modern jewelry How to identify the authenticity of gold? Where can I identify Linping?

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2 thoughts on “wholesale modern jewelry How to identify the authenticity of gold? Where can I identify Linping?”

  1. Emanuel

    crazy train jewelry wholesale one. Look at the color
    The different luster and color of gold can be generally distinguished from pure gold, K gold, real gold, fake gold. That is, gold is better with red yellow, and the color is more than 95 %; the positive yellow color is about 80 %; the blue and yellow color is about 70 %; the yellow color is slightly gray and the color is about 50 %. Therefore, there is a formula for "seven greens, eight yellow, nine five red, and yellow leucorrhea ash. For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color".

    . Look at density
    The density of gold is 19.32 grams / cubic centimeter, which is about double the same volume of silver, lead, and tin. Available formula: The mass (gram) of a certain gold jewelry (gram) is equal to density than the volume (cubic centimeter) of a certain gold jewelry (cubic centimeter). Seeking the density of the gold jewelry measured, the density is about 19.32 grams / cubic centimeter, it is pure gold or relatively pure gold, otherwise it is a non -pure gold or color difference gold (this method has no destructiveness to the jewelry).

    . Folding hardness
    Gold has the characteristics of ductility and small hardness, which can be compressed into a thin piece of 12.7 microns. When the color is high, marks can be left with large head needles or nails. More than 97 % of gold jewelry, after twisting two or three times, wrinkles appear at the bend, also called fish scales; about 95 % gold jewelry, feel hard when bending, the fish scales are not obvious; The jewelry is very hard when the bending is bent, without fish scales; gold jewelry containing more impurities, bend twice or three times to break; if it is made for raw gold, the bend is broken. When using this method, the width and thickness of the jewelry should be considered. The thick and width should be hardened, and the thin and narrow ones are softer.

    . Listening to the rhyme, watching elasticity
    When the high -quality gold jewelry is knocked out or threw it hard, it emits a dull sound of "daedy, dwelling", and no sound rhyme, no elasticity, K gold rhyme, sound sound, sound sound, sound, sound, sound, sound, sound, sound, sound, sound, sound, sound, sound, sound There are elasticity, the greater the elasticity, the more the rhyme, the more older, the worse the color.

    . Use the test gold stone to identify the color
    Plip the gold -pairing card (the gold medal that has been determined) and the test jewelery on the test gold stone, through the contrast color, determine the color of the gold jewelry. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps.

    . Use the acid point
    The golden roads that have been identified and the cards are grinded on the test stone. Trying nitric acid on the golden road with a glass stick. Because the chemical properties of the golden element are stable and do not react with the acid, the color remains unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes. The law of changes is "three fast, three slows", that is, the low color disappears quickly, and the high color disappears slowly; Depending on the disappearance of its golden road, compare cards can determine the color of gold jewelry.
    The appraisal gold, jewelry shops should be identified. Why, don't you buy fake goods?

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