3 thoughts on “Is there any way to see the authenticity of gold?”
Brad
How does gold identify authenticity? The gold jewelry has many appraisal methods. The Chinese folk summarizes a set of simple methods. The formula is: look at color, 掂 weight, listening rhyme, folding hardness, stone grinding, contrast cards, acid dots, and color. The first four sentences depends on the eyes and the feeling; the latter four sentences need to be used by tools and reagents. . See the color and color according to the different gloss and color of the 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". . The density of density 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 more 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 hardness, and can be pressed into thin pieces 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 bending, also called fish scales; about 95%of gold jewelry, it feels hard when bending, and the fish scales are not obvious; about 90%of the golden gold golden gold; 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. . When listening to the rhyme, the golden jewelry with high elasticity and the high -quality gold jewelry is knocked out or threw it hard, it emits a dull sound of "dwelling, dwelling", and has no rhyme and elasticity. , Sound, elasticity, the greater the elasticity, the more the rhyme, the more the elderly, the worse the color. . The color of the gold -pairing card (determined gold medal) and the subject jewelry are used to use the test stone to identify the color card (the gold medal that has been determined in color). Through the contrast color, the gold jewelry is determined. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps. . Use acid points to grind the golden trail of identified jewelry and cards on the test stone. Try the nitric acid on the golden road with a glass stick. Change. 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.
Generally, there are performances in TV series. Although the gold density and heavy, the hardness is low. Generally, it is true to bite with the teeth, but it is still recommended for precise measurement and judgment. After all Testing, let the professionals distinguish you. They specifically do gold recovery and have professional testing equipment. If you have the gold you want to sell, you can also sell it to them. Take a lot of money.
How does gold identify authenticity?
The gold jewelry has many appraisal methods. The Chinese folk summarizes a set of simple methods. The formula is: look at color, 掂 weight, listening rhyme, folding hardness, stone grinding, contrast cards, acid dots, and color. The first four sentences depends on the eyes and the feeling; the latter four sentences need to be used by tools and reagents.
. See the color and color according to the different gloss and color of the 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".
. The density of density 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 more 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 hardness, and can be pressed into thin pieces 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 bending, also called fish scales; about 95%of gold jewelry, it feels hard when bending, and the fish scales are not obvious; about 90%of the golden gold golden gold; 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.
. When listening to the rhyme, the golden jewelry with high elasticity and the high -quality gold jewelry is knocked out or threw it hard, it emits a dull sound of "dwelling, dwelling", and has no rhyme and elasticity. , Sound, elasticity, the greater the elasticity, the more the rhyme, the more the elderly, the worse the color.
. The color of the gold -pairing card (determined gold medal) and the subject jewelry are used to use the test stone to identify the color card (the gold medal that has been determined in color). Through the contrast color, the gold jewelry is determined. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps.
. Use acid points to grind the golden trail of identified jewelry and cards on the test stone. Try the nitric acid on the golden road with a glass stick. Change. 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.
Generally, there are performances in TV series. Although the gold density and heavy, the hardness is low. Generally, it is true to bite with the teeth, but it is still recommended for precise measurement and judgment. After all Testing, let the professionals distinguish you. They specifically do gold recovery and have professional testing equipment. If you have the gold you want to sell, you can also sell it to them. Take a lot of money.
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