First, hardness. Gold has low hardness and soft texture; Colored gold has high hardness and good toughness.
Second, color. The color of gold changes with the purity. The higher the purity, the darker the color of gold. The color of colored gold is varied, which depends on the color change of different metal elements synthesized.
Third, stored value. Gold is an international currency, which can effectively avoid risks. People buy gold as a stored value collection. The main value of lottery gold lies in its ornamental function and exquisite craftsmanship.
develop
：
Color gold is K gold, which is changed by adding some ingredients. K gold refers to gold with purity lower than 99%.
In fact, it is a mixture of gold and other rare metals, so it is not as valuable as platinum. Platinum is purchased by the wheel, while lottery gold is priced according to the finished product because of the uncertain content of various metals.
Lottery gold is a mixture of gold and other precious metals. Yellow and white look beautiful, avoiding the custom of gold and expensive platinum elements.
Color gold is k gold with some precious metals, which become different colors.
Lottery gold is generally 18k gold.
The purity of gold is expressed by "K gold".
Gold is a simple form of chemical element gold (chemical element symbol Au), which is a soft, golden yellow and corrosion-resistant precious metal. Gold is a rarer, more precious and more valuable metal.
Generally speaking, the gold in the world is in ounces. In ancient China, gold was measured in ounces, which was a very important metal. It is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication and aerospace industry.
The chemical symbol of gold is Au, and the financial English code is XAU or gold. The name Au comes from a story of Aurora, the goddess of dawn in Roman mythology, which means shining dawn.
After the international gold price entered 20 15, it soared all the way. The gold price in new york market rose from $0/200 per ounce to $0/300 per ounce in less than a month. Statistics show that since 20 15, the price of gold futures in new york market has increased by 9.3%.