wholesale jewelry to put pearls in
2 thoughts on “wholesale jewelry to put pearls in How to see if gold is pure gold?”
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wholesale jewelry to put pearls in
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wholesale jewelry venders (1) See color: the higher the purity of the gold jewelry, the deeper the color. (3) Look at the hardness: pure gold is soft and low. It can draw light marks with nails. Teeth bite can leave dental marks. High -colored gold jewelry is low in color. It can also test hardness, pure gold is soft, easy to bend, the lower the purity, the less likely to bend. (4) Listening to the sound: Throwing the real gold with more than 99%of the color will make a tap sound, there is no rhyme or elasticity. (5) Burning with fire: The jewelry will be burned red (do not melt the jewelry) with the fire (do not melt the jewelry). After cooling, observe the color change. If the surface is still the original golden color, it is pure gold; It is not pure gold. (6) Seeing the mark: Domestic gold jewelry is allicized and prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold"; Those who are in LOK can not play the K -printed number according to regulations.
jewelry dubai wholesale 1. Look at the color
The different luster and color of the gold can be generally distinguished from pure gold, 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%. Therefore, there is a formula for "seven green eight yellow, yellow nine five red, yellow leucorrhea ash pairs of gold". For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color".
2, 量 weight
D gold weight 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, listening to the sound
When the high -quality gold jewelry is knocked out or threw it hard, the dull and low sound of "click, click", there is no rhyme or elasticity, and K gold has sound charm. , Sound, elasticity, the greater the elasticity, the more the rhyme, the more the elderly, the worse the color. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
4, folding hardness
has a high color gold, and traces 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.
5. Use the test goldstone to identify the color
The use of the gold -pairing card (the gold medal identified as a color) and the subject's first jewelry on the test gold stone to determine the color of the gold jewelry through the contrast color. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps.
This in the past often used testing gold stones to determine the general content of gold. Testing gold stones are a mixed black mineral such as quartz and protein -containing quartz, and the gold is drawn on the test stone to see the general shape of the gold. Pure gold: shiny dark yellow, thick yellow; silver gold: light color change slightly green green; gold containing silver greater than 25%of gold: earth white; copper -containing gold: deeper color, red color tone; silver copper tone; Gold: yellow; gold containing zinc, same, nickel: white gold.
7. Burning with fire
This will be used to burn red (do not melt the jewelry) with fire (do not melt the jewelry), and observe the color change after cooling. The color becomes darker or different degrees of black, not pure gold. Generally, the lower the color, the stronger the color, and the darkens are all, indicating that it is a fake gold jewelry. After burning red, it is quenched into the water, and the color remains unchanged. It really does not change color when it comes to fire.