Very good. Lao Fengxiang is a big brand and trustworthy
extended data: gold is the elemental form of the chemical element gold (AU), which is a soft, golden yellow and corrosion-resistant precious metal. Gold is one of the rarer, more precious and highly valued metals. Gold is generally measured in ounces internationally. Gold is not only a special currency for reserve and investment, but also an important material for jewelry, electronics, modern communications, aerospace and other sectors physical properties 1. Color: when gold is melted, the steam emitted is yellow green; In the smelting process, its gold powder is usually brown; If it is cast into a thin piece, it can transmit green light 2. Extensibility: unusually strong. One ounce of gold can be drawn 50 miles long. Its ductility makes it easy to cast. It is a good choice for making jewelry. Gold has the strongest pulling force among all metals 3. Malleability: second to none. An extremely thin gold sheet that is easy to roll up can be produced. An ounce of gold can be hammered as thin as 400 millionths of a foot and 100 square meters_ Large area. In ancient times, it was hammered into thin slices to be paved into temples and palaces for decoration. All these can show the flexibility and malleability of gold
inspection method for gold: 1. Whether gold has white bright spots cut gold bars or gold jewelry with material scissors and observe the section with a magnifying glass. If you see white bright spots, because gold and iridium cannot be fused together, it means that the gold contains iridium 2. Measure specific gravity first measure the weight of a pure gold bar with a balance, then put the gold bar into a measuring cup, and pour water to cover the gold bar. Then put the tested gold bar into the measuring cup and observe whether the scale of water rises or falls. If there is any change, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable, because there is air in the gold jewelry 3. True gold is not afraid of fire burn the gold bar or gold jewelry on the fire for a while and observe its change. Because iridium will combine with oxygen in the air to produce oxidation reaction, gold bars with insufficient purity will turn grey; And pure gold will glow red after being roasted. However, this method may damage jewelry to some extent.
Very good. At least Lao Fengxiang ranks very high among all kinds of jewelry brands in China. As for Hong Kong brands such as Chow Tai Fook and Lau Fook, their strong points are that the workmanship is indeed fine and beautiful, but the gold quality is indeed slightly worse. Of course, it is very subtle
Lao Fengxiang's gold jewelry is good, bracelets, rings and necklaces The craft is very good. Jewelry should be more expensive, and investment gold bars should be cheaper. There are 430 grams of gold and 435 grams of platinum. The content and price of platinum are different.
It's very general. I bought Lao Fengxiang and my classmates bought other brands. After wearing them for a while, they are brighter than others. Alas! It cost more than 100 yuan
Very good. Lao Fengxiang is a big brand and trustworthy
extended data:
gold is the elemental form of the chemical element gold (AU), which is a soft, golden yellow and corrosion-resistant precious metal. Gold is one of the rarer, more precious and highly valued metals. Gold is generally measured in ounces internationally. Gold is not only a special currency for reserve and investment, but also an important material for jewelry, electronics, modern communications, aerospace and other sectors
physical properties
1. Color:
when gold is melted, the steam emitted is yellow green; In the smelting process, its gold powder is usually brown; If it is cast into a thin piece, it can transmit green light
2. Extensibility:
unusually strong. One ounce of gold can be drawn 50 miles long. Its ductility makes it easy to cast. It is a good choice for making jewelry. Gold has the strongest pulling force among all metals
3. Malleability:
second to none. An extremely thin gold sheet that is easy to roll up can be produced. An ounce of gold can be hammered as thin as 400 millionths of a foot and 100 square meters_ Large area. In ancient times, it was hammered into thin slices to be paved into temples and palaces for decoration. All these can show the flexibility and malleability of gold
inspection method for gold:
1. Whether gold has white bright spots
cut gold bars or gold jewelry with material scissors and observe the section with a magnifying glass. If you see white bright spots, because gold and iridium cannot be fused together, it means that the gold contains iridium
2. Measure specific gravity
first measure the weight of a pure gold bar with a balance, then put the gold bar into a measuring cup, and pour water to cover the gold bar. Then put the tested gold bar into the measuring cup and observe whether the scale of water rises or falls. If there is any change, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable, because there is air in the gold jewelry
3. True gold is not afraid of fire
burn the gold bar or gold jewelry on the fire for a while and observe its change. Because iridium will combine with oxygen in the air to produce oxidation reaction, gold bars with insufficient purity will turn grey; And pure gold will glow red after being roasted. However, this method may damage jewelry to some extent.
Very good. At least Lao Fengxiang ranks very high among all kinds of jewelry brands in China. As for Hong Kong brands such as Chow Tai Fook and Lau Fook, their strong points are that the workmanship is indeed fine and beautiful, but the gold quality is indeed slightly worse. Of course, it is very subtle
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Lao Fengxiang's gold jewelry is good, bracelets, rings and necklaces The craft is very good. Jewelry should be more expensive, and investment gold bars should be cheaper. There are 430 grams of gold and 435 grams of platinum. The content and price of platinum are different.
It's very general. I bought Lao Fengxiang and my classmates bought other brands. After wearing them for a while, they are brighter than others. Alas! It cost more than 100 yuan