Is your gold jewelry so high in purity?
Gold with a purity of 99% can be called “foot goldâ€, gold with a purity of 99.9% is called “Thousands of Goldâ€, gold with a purity of 99.99% is called “Million Goldâ€, and gold with a purity of 99.999% can be called "100,000 gold" or "high purity gold." When the Chinese were celebrating the Spring Festival, global stock markets fell sharply, and most stock markets fell into the bear market. Investors’ risk aversion is high, pushing international gold prices to break through $1,200 per ounce. Although China is in a state of holiday, the Chinese are not idle. Many Chinese people are eager to buy gold jewelry during the Chinese New Year. China's gold imports rose by more than 700% in 5 years CNN, the US media, recently reported that China has entered the era of “crazy purchasesâ€. In just five years from 2010, China’s gold imports soared by more than 700%. According to John La For GE, head of commodity group at Wells Fargo, 40% of the world's gold mined every year has flowed into mainland China. According to Hong Kong data, the total amount of gold imported by China was only 100 tons in 2010, but it has risen to nearly 1,000 tons last year. CNN analyzed in the article that gold is more in the pockets of the increasingly wealthy Chinese people. Chinese people buy gold mainly for gold jewelry. Although wealthy and rich, you can buy gold, but you can't be willful. What should I do if I buy gold that is not of high purity? Let's take a look at the purity class of gold and introduce several methods for identifying the purity of gold for your reference: "K" gold and "foot gold" in the end Internationally, people often use "K" to measure the content of gold or the purity of gold. "K" is taken from Karat in French. 24K gold means pure gold, then 1K means 1/24, or 4.1666%, so 1K means that the gold content is 4.1666%. Then 18K gold means that the gold content is 18/24, which is 75%, and the remaining 25% is other metals. In China, when it comes to the purity of gold, people may listen to more gold, such as thousands of gold, 10,000 gold, 100,000 gold and so on. Gold with a purity of 99% can be called “foot goldâ€, gold with a purity of 99.9% is called “Thousands of Goldâ€, gold with a purity of 99.99% is called “Million Goldâ€, and gold with a purity of 99.999% can be called "100,000 gold" or "high purity gold." Due to the defects of the smelting technology itself, 100% pure gold does not exist at all. Nowadays, people buy more gold jewellery, and many merchants also use people's lack of knowledge of gold to swindle and even fraudulent propaganda. According to the "Purification and Nomenclature of Jewelry Precious Metals", the minimum purity of pure gold is 990, that is, the purity is not less than 990 ‰; the minimum purity of thousands of gold is 999, that is, the purity is not less than 999 ‰. The national standard for the purity of gold refers to the lowest purity. Gold jewellery will have a mark on the purity of gold. For example, 18K gold is marked on the jewellery as “G18Kâ€, “Au750†or “Gold 750â€; thousands of gold is marked on the jewellery as “G999†“Au 999†or directly Mark 3 words of "Thousands of Gold". Below we will introduce several ways to identify the purity of gold jewelry: The first method: look 1, look at the color. Everyone knows that gold is yellow, the higher the purity of gold, the deeper the yellow. Gold with a purity of more than 95% is reddish yellow, gold with a purity of 90% to 95% is light reddish yellow, gold with a purity of 80% to 85% is light yellow, and gold with a yellowish color is 60% to 70% pure. The yellowish yellowish white gold purity may be less than 50%. 2, look at the mark. Gold jewelry generally has a fixed position on the mark of purity. The mark of the ring is generally on the inner ring of the ring; the mark of the pendant is generally on the ring; the earring mark is generally on the surface of the ear hook. We have already mentioned the mark style of gold purity, which will not be described here. 3. Look at the discoloration. Check the worn area of ​​the gold surface, usually at the edge of the gold product, and check for discoloration. If the gold color fades away and becomes another color, then the product is just a gold plated. The second method: measuring hardness Pure gold is soft and easy to bend. The lower the purity, the less likely it is to bend. The hardness can be measured by biting or bending. This method is simple, but it is very rude. The method of measuring the gold purity of jewelry needs to be used with caution. The third method: density test Jewelry stores have equipment or instruments that test the purity of gold. You can put your gold product in a container filled with water, then test the volume of the spilled water, and then divide by the weight of the product you are weighing, which is the density of your gold product. Keep in mind that different gold purityes have different grams/ml ratios: 18k yellow gold has a density of about 15.2 to 15.9 grams/ml, and 24K gold has a density of about 19.3 grams/ml. This method is cumbersome for testing gold jewelry, but the accuracy is very high, and will not hurt the jewelry. The fourth method: listening to the sound Gold with a purity of more than 99% throws it on the hard ground, and it will make a loud noise, but there is no rhyme and no elasticity. The fake or low-quality gold sound is crisp and not dull, and generally emits "Dangdang (US stock 6.55 + 8.62%)" sound, and the sound has a residual sound, and it beats vigorously after landing. This method is simple and easy, but requires the buyer's hearing to be particularly good. The fifth method: burn with fire As the saying goes: "The real gold is not afraid of fire." Always use a fire to grasp the degree. Use the fire to identify the jewelry to burn red (do not let the jewelry melt and deform), observe the color change after cooling, if the surface is still the original gold color is pure gold; if the color is darkened or blackened to varying degrees, it is not pure gold. If all turns black, it means a fake gold jewelry. In addition, we also use instrument testing and chemical testing. We will not introduce them one by one. I believe the above method is enough to let you test whether your gold jewelry is true or not. Long Blushed Fleece In Polyester Cotton,Cationic Polyester Cotton Fleece Fabric,Blushed Knit Cotton Fabric,Two Side Blushed Interlock Fabric Shaoxing Sinofashion Textiles Co.,Ltd. , https://www.shownaturetex.com
