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2 thoughts on “wholesale vendors jewelry How to identify the authenticity of gold”
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wholesale accessory market western jewelry The authenticity of the gold can have the following methods as a reference:
1. Seeing color, luster identification
K gold, real gold, fake gold. That is, gold is better yellow (yellow -red), 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%.
This discriminatory formula is "seven green eight yellow nine five red red, yellow leucorrhea gray pairs of gold". If it is for a long time, there will be a saying that "copper turns green, silver turns black, and gold will never change color."
2. Differentiated by weight
The gold is about double the same volume of silver, lead, and tin. True gold has a feeling of falling on the hand, while copper or others only have a sense of heavyness without falling.
3. Listen to the sound of sound
When the high -color gold jewelry is tapped or threw hard to throw it, the dull sound of "daedy, click", no sound, no sound, no sound There is no elasticity in the rhyme. K gold has sound rhyme, sound, elasticity. The greater the elasticity, the more the rhyme, the more old, the worse. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
4, identified from gold hardness — folding hardness
Nail engraving can leave traces.
97%of gold jewelry. After twisting two or three times, wrinkles appear, also called fish scales; Fish scales are not obvious;
90%gold jewelry, which is very hard when bent, without fish scales; Made in gold, break the bend, and the section has obvious sand -grained shape.
But when you use this method, you need to consider the width and thickness of the jewelry. The thick and width are harder, and the thin and narrow ones are softer.
5. Use the test gold stone to identify the color
The use of the determined gold and the subject's first jewelry on the test gold stone. Through two comparison colors, the gold jewelry is determined. This method needs to be performed under natural light and sunlight, and cannot be performed under the direct sunlight and incandescent lamps.
The golden stones are a black and hard stone. With gold drawing a pattern on it, you can see the color of gold. The name of the mineral science is Bixuan Rock, also known as vermiculite soveree, silicon slate, etc. It belongs to the Xuan Wuyu rock, which is dense and hard, and it is black.
Is when using the golden stone to grind the road, generally hold the stone with the left hand, take the gold in the right hand, the stones should be on the top, the rest of the finger, half of the oil on it, and the stones horizontally in the hand in their hands Hold you, stabilize on the desktop, do not move.
This should be tightly held down on the stone surface when grinding the lane, and the right hand of gold should be used to use the wrist force. The grinding road is generally 2 cm long and 0.5 cm wide. The number of grinds, large (bar, ingot) should be about 20 times, and small pieces should be more than a dozen times. When grinding, gradually spread out from one end to avoid repeatedly grinding. The physical road is long and wide to the deck to facilitate the more color.
Pure gold: shiny dark yellow, thick yellow; silver gold: light color change micro -band -inflammatory green; gold containing gold greater than 25%: soil white; copper -containing with copper; Gold: The color is deepened, with red tones; gold containing silver and copper: yellow; gold containing zinc, same, nickel gold: platinum.
6, acid dot
Man the golden stone on the testing stone, respectively, respectively, respectively, respectively, respectively. , Do not respond to acid, so the color is unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes.
The law of change is "three fast, three slows", that is, low -quality disappearance and high disappearance slowly; Quick, Xiao Mai Disappear Slow. Depending on the disappearance of its golden road, the comparison of the comparison can determine the color of gold jewelry.
7. Burning with fire
Thenia will be identified to burn red (but do not melt the jewelry), wait for the gold jewelry to cool down, and observe the color changes after cooling. The original golden color is pure gold; if the color becomes dark or different degrees of black, it is not pure gold.
Generally speaking, the lower the color, the stronger the color, all of which become dark, indicating that it is a fake gold jewelry. After burning the gold jewelry, it is quenched into the water, and the color remains unchanged. It really does not change color when it comes to fire.
8. Send it to a professional testing agency to allow professionals to identify and identify.
9, bromine chemistry test
This in the alcohol solution for a small meeting, and then soaked a filter paper. Drop 4 drops of bromo -A reagent to the filter paper. If the filter paper becomes white, then this gold product is real gold.
extension information:
Gold cleaning method:
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1, protection The gloss of the gold jewelry can be applied to a layer of nail polish thinly on it.
2. If there are black silver films on the surface, 2 grams of salt, 7 grams of soda, 8 grams of bleaching powder, 60 ml of clear water, are made into a "golden cleaner", and gold Put the jewelry in a bowl, pour the cleaning agent. After 2 hours, remove the golden jewelry, rinse with water (preferably not hard water), buried in the wood chips to dry, and then wipe it with a soft cloth.
3, the ring inlaid rolls a piece of cotton with a popsicle or match stick, wet the gemstone and its frame in the mixed fluid of the dew and glycerin, and then use the pills to lighten the ring. Do not scrape it with a kind of sharp objects.
4, salt and vinegar mixed with synthetic cleaner, and use it to wipe the pure gold jewelry, which can make it long for a long time.
5, toothpaste wipe or scrub with hot rice soup, and it can also restore gloss.
6, scrubbing with ammonia water
african tribal jewelry wholesale Mainly the following methods:
1. Looking at the color, the real gold color has the saying of seven blue eight yellow nine five red, gold that is not corresponding to color and color is likely to be false; 2. The weight of the weight of the weight; The real golden feel is relatively heavy, and the fake gold feels lighter; 3. The test hardness, real gold can use nails to draw traces, fake gold texture is hard. "