Which brand of gold is better

1. Lao Fengxiang
Lao Fengxiang Yinlou is the only century -old shop in China. Lao Fengxiang's golden jewelry is classic, with excellent quality and is loved by the public. Especially its golden wedding jewelry is very popular with newcomers.
2, Zhou Dafu
Zhou Dafu was founded in Hong Kong in 1929. It is the most famous Hong Kong jewelry brand in mainland China. The first 999.9 pure gold jewelry has become a model for the gold jewelry industry. In the early 1990s, Chow Tai Fook decided to "currently buy" with a reasonable cost and profit, which became another generation of noun for "genuine goods".
3. Ancient temple
The old temple gold originated in Shanghai. It not only has deep heritage, but also has its own unique cultural connotation. In terms of craftsmanship, the old temple's gold jewelry has exquisite shapes and creates many classic styles of gold jewelry. In terms of price, it is very real. It can be said that it is a cheap gold jewelry.
4. Zhou Shengsheng
Zhou Shengsheng, born in 1934, from Guangzhou. Like Zhou Dafu, he is also a well -known jewelry brand in China. Zhou Shengsheng's gold jewelry not only has novel styles, but also has a good workmanship, which has been enthusiastically sought after by many young people.
The expansion information:
Gold is the element form of chemical element gold. It is a soft, golden and corrosive precious metal. Gold is a rare, more precious and more valuable metal. Gold is generally represented in the world. In ancient China, the "beam" was used as a golden unit. It is a very important metal. It is not only a special currency of reserves and investment, but also an important material for the jewelry, electronics industry, modern communications, aerospace industry and other departments.
The chemical symbols of gold are AU, and the English code of finance is XAU or GOLD. The name of the AU comes from the story of the goddess Aurora in Roman mythology, which means the shining dawn.
As of October 12, 2021, the price of gold was $ 1760/ounce.
physical characteristics
1. Color:
The steam released during the melting of gold is yellow -green; during the smelting process, its gold powder is usually brown; if it is cast into thin slices, it can show green Light.
2. Digitability:
is extremely powerful. One ounce of gold can be pulled out of 50 miles long. Its ductility makes it easy to cast. It's a good choice for jewelry. Gold is the highest intensity among all metals.
3. Extension:
row first. It can cause extremely thin gold films to roll up. One ounce of gold can be hammered as thin as 4 million feet thick and 100 square feet larger. The ancients hammed it into thin pieces, paving temples and palaces as decoration. These can show the elasticity and ductility of gold.
chemistry
gold (transition metal), gold code is xau_usd, xau is chemical element code;
crystal structure: Facial cubic structure
Atom volume: 196.96654
shell shell Structure: 2, 8, 18, 32, 18, 1
Electronic layout: [XE] 4F14 5D10 6S1
Comprehensive price: 1, 3
Felter point: 1064.43 ℃
Boiling point: 2808 ° C
Electricity: 2.54
The total price radius: 1.34a
ionic radius: 0.85 ( 3) a
Atomic radius: 1.79a
Atomic atoms Volume: 10.2cc/mol
The first level of ionizing potential: 9.2257 V
Two -level ionization potential: 20.521 v
The oxidation state: (3), 1
293k density: 19.32 g/cm3
than hot capacity: 0.128J/GK
Vol. -in heat: 334.4kj/mol
Most -melting heat: 12.55kj/mol
Catch rate: 0.452x106cm · ω
Thermal conductivity: 3.17W/CMK
Elasticity coefficient: 78.3 x103 MPA
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