Get the money always go to buy gold jewelry, but many people do not know how to distinguish the true and false, also do not know the purity of gold. Today career knowledge will teach you a few tricks.
Tips for identifying the authenticity of gold jewelry:
1. Look at the color
The difference in luster and color of proof gold can be distinguished from pure gold, K gold, real gold and fake gold. The old jargon “seven green, eight yellow and ninety-five red, yellow and white with gray and half gold” is to describe the purity of gold, the color of green and white is not high purity, the color of red and yellow is high purity.
2. Look at the symbols
Domestic yellow soft products according to the demarcation are to be stamped, marked 24K on behalf of the purity of more than 99.6%, marked 18K, indicating the purity of more than 75%.
3, look at the hardness
High color gold, with a pin or nail scratching can leave traces. More than 97% of the color of gold jewelry, bending two or three times, the bend wrinkles, also called fish scale; About 95% of the color of gold jewelry, bending feel hard, fish scale is not significant; About 90% of the color of gold jewelry, bending is very hard, no fish scale; Gold jewelry containing more impurities, bending two or three times is broken; Such as gold production, bending is broken, the cross section has a significant sand granular.
4. Listen to the sound
The real gold with more than 99% of the color is thrown on the hard ground, and it will make a buzz sound, and there is no rhyme or elasticity. False or low color gold sound crisp and no dull sense, as usual issued a “dangdang” sound, and the sound has a lingering sound, after landing beating violently.
5. Weigh
The proportion of gold is 19.3g/cm3, the color is closely related to the proportion, and the proportion is close to 19.3, the higher the pure gold. Weigh its weight by hand to see whether it is equal to the size of the volume, and the shape is large and light may be adulterated. But as usual in the hands, if a slight sinking sense can be perceived as real gold jewelry, visible gold body small weight. Be careful about big and light jewelry, and carefully identify whether it is counterfeit or semi-counterfeit.
6. Test the hardness
The higher the color of gold jewelry, the softer and more inelastic, the real gold has light marks with teeth or needles, and no broken lines with hands. Low color steel hard; Remixers are elastic, brittle and brittle. Pure gold is soft, as usual do not need to do inlaid jewelry, so that where inlaid class soft claim 24K, there must be fraud.
7, scraping porcelain plate method
Find an unglazed porcelain plate, if not, you can go to the home improvement store to buy a piece of China. If you scrape a porcelain dish with a gold utensil, if there is a dark scratch on the porcelain dish, your gold utensil is not real gold; if the scratch is gold, it is real gold.
This way the fake gold can be revealed, but your gold may be scratched.
8, nitric acid honing method
Put the gold ware into a small stainless steel container, drop a drop of nitric acid on the gold ware, and investigate the reaction. If the acid drops appear green, then the gold object is either made of plain metal or gold-plated. If it’s gold, it’s gold-plated copper. If it’s milky, it’s gold-plated silver. If nothing happens, then the gold is real.
Nitric acid honing is a good facility to identify the authenticity of gold, but because nitric acid is not easy to obtain, and it is also dangerous to operate at home, it is recommended that everyone hand over to the jeweler to do.
Gold jewelry recuperation way
1, cleaning chemicals will change the color of gold, so you should remove fine soft products before cleaning things.
2, prevent direct contact with perfume, hair spray and other highly volatile substances, otherwise it is easy to lead to soft fading.
3, swimming to take off the soft, so as not to touch the sea water or pool water, the surface chemical transformation.
4, storage time with flannelette wrap and then put into the jewelry box, to prevent mutual friction damage.
5, gold comparison soft, easy to deformation, so do not pull necklaces and other jewelry, so as not to deformation.
6, pure soft products in the encounter of mercury will have a chemical reaction, white black spots, as long as the alcohol lamp barbecue for a while when washing, you can restore the color.
7, wear after the soft often due to stains and dust contamination and tarnish, at this time, as long as the soft in neutral detergent soaked in warm water and wash, and then take out wipe dry.
