2. Most of the silver ornaments are rough and hard, and the gold ornaments are soft and fine in workmanship. When they are worn at the same time, due to daily activities, they often collide, and silver products will scratch the surface of gold ornaments, on the one hand, it will destroy the beauty of gold ornaments. On the other hand, the surface of silver is stained with trace gold ions, so that germanium in it can not directly contact with the skin, thus affecting its health care effect. Therefore, germanium and silver ornaments should not be worn with gold ornaments.
Extended data:
1. 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, gold in the world is measured 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.
2. 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.
3. The international gold price soared after entering 20 15, and 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%.
References:
Germanium-Baidu encyclopedia