How about Laofengxiang Gold?

Very good, Lao Fengxiang is a big brand and trustworthy.

Extended data:

Gold is the elemental form of gold (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. Gold is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication, aerospace industry and other departments.

physical features

1, color:

When gold melts, the steam emitted is yellow-green; Its gold powder is usually brown when it is melted; If it is cast into thin slices, it can transmit green light.

2. Extensibility:

Extremely powerful. 1 oz gold can be stretched to 50 miles long, and its ductility makes it easy to cast, making it a good choice for making jewelry. Of all metals, gold has the greatest pulling force.

3. Extensibility:

Second to none. It will cause extremely thin gold sheets to roll up easily. Gold weighing 1 oz can be hammered down to 1 ft, 100 m2. The ancients hammered it into thin slices and spread it in temples and palaces for decoration. All these can explain the flexibility and ductility of gold.

Inspection method of gold:

1. Does gold have white highlights?

Cut the gold bars or jewelry with scissors, and observe the section with a magnifying glass. If you see white bright spots, because gold and iridium can't blend together, it means that gold is doped with iridium.

2. Measure the 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 drown it. Then put the detected gold bars into a measuring cup and observe whether the scale of water rises or falls. As long as there is a change, it means that gold bars are not pure gold. But if it is gold jewelry, this method is not applicable, because there is air in gold jewelry.

Real gold is not afraid of fire.

Put gold bars or gold jewelry on the fire for a period of time and observe its changes. Because iridium will combine with oxygen in the air to produce oxidation reaction, gold bars with insufficient purity will turn gray; And pure gold will appear bright red after being baked by fire. However, this method may have some damage to jewelry.