Since the beginning of the new century, China’s gold investment has suddenly heated up, and the gold market has shown a trend of heavy volume. Behind this "golden heat", there is a direct pull of the rising gold prices in the international market, which reflects the rise of the Chinese gold investment awareness. With the heat of gold, many people began to wear investment collection gold jewelry. But some gold knowledge you can't help but know. Follow the pace of Xiaobian and walk into the Golden Collection.
As the saying goes, "gold has no foot red", that is to say, there is no 100% pure gold. In China's industry standard, the highest purity gold is thousands of gold, followed by gold.
Wanjinjin has no defined standard
The total amount of gold, that is, four 9 gold, in general, the purity of spot gold purchased by the Shanghai Gold Exchange is generally 999.9%, or 999.7%. The former has reached the standard of 10,000 gold, but in the process of making jewelry, the need to add solder to the casting will have an impact on the purity. Although it is theoretically feasible and exists, there is no standard support in actual operation, and it is the only one in China's jewelry industry. The mandatory national standard "Regulations and naming methods for the purity of precious metals for jewelry" cannot be found in the identity of gold with a gold content of 999.9%. In contrast, gold bars do not have solder problems, so the purity of gold bars is often better than gold jewelry.
Thousands of gold
It is 999 gold. It refers to gold with a gold content of not less than 999c/o (ie 99.9%). Thousands of gold is commonly known. Usually it is best to invest in gold bars or coins. (Foot gold refers to gold with a gold content of not less than 99%)
3D hard gold is a craft, not a gold content
Also called 3D hard thousand gold. It is a new product that has only come out in recent years. It does not refer to gold content, but refers to an improved invention of a gold electroforming process for the manufacture of hollow thousand gold products with complex shapes, fineness, high hardness and strong abrasion resistance.
Advantage:
1, 3D thousand hard gold hardness is 4 times higher than traditional gold, very close to the hardness of 18K gold; effectively overcome the shortcomings of thousands of gold jewelry low hardness, easy to wear, not easy to maintain a detailed pattern.
2, 3D hard thousands of gold is mostly chic and looks bigger, that is, the same size of jewelry, 3D hard thousand gold is much lighter than ordinary thousand gold, but its labor costs are very high.
Disadvantages:
Market recognition is not enough, pending market testing.
First of all, Wanjinjin is the purest gold jewelry, purer than pure gold. Its value lies in its highest purity, in its technology and process of achieving the highest purity, its aesthetic value and collection value are naturally highlighted.
Because the hardness of gold jewelry is low, it should be handled gently when wearing it. Avoid rubbing and rubbing against hard objects. Do not pull, pull or smash. In particular, diamonds can be rubbed against each other due to different hardness, so they are stored separately using jewelry boxes.
Some unscrupulous merchants often add 铱 elements to the (thousands) of gold to make huge profits.
铱In the periodic table of chemical elements, it is close to gold. Its density is very similar to gold, but the price is five to one tenth of gold. The market price per gram is only 50~90 yuan, but each The market price of gram gold is 300~400 yuan, and the disparity difference induces some merchants to impersonate gold.
Gold has a unique golden yellow luster, and pure gold shines under intense light.
Seven greens, eight yellows, nine belts are red, and four or six are not gold. Gold containing 70% gold is blue-yellow, gold containing 80% gold is yellow, gold containing 90% is red-yellow, color is less than 60% gold, and the color is yellow in yellow.
There is no sound on the floor, pointing to the mark. The high-quality gold is thrown to the ground without sound and no stretch; the low-quality gold sound is slightly brighter. Pure gold is soft and soft, and nails can be used to print marks.
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