5 thoughts on “How to distinguish copper and gold?”

  1. Lonnie

    1. Softness: In terms of softness, gold is softer than brass. For example, it can be bent to see, and the bending jewelry description is gold jewelry.
    2, leaving scratches: The hardness of the gold is relatively low, and the scratches can be left through the fingers through your fingers. Therefore, the scratches will be left with gold, otherwise it will be brass.
    3, fire burning method: As the saying goes, the real gold is not afraid of fire, so you can burn the jewelry. If it contains brass substances, it will be oxidized into a black silk.
    4, dilute acid: Put the jewelry into the thin acid. If there is a bubble, it means that the jewelry is a brass jewelry, because brass will have a chemical reaction with acid.
    Extension information:

    Themore to buy gold jewelry:
    1, color: distinguish the quality of gold jewelry. You can judge the quality of the jewelry through color and luster, hardness, good yellow yellow, and high -colored golden nails can leave traces. The higher the purity, the darker the color.
    2, weight: Gold jewelry is divided into K gold and pure gold, K gold is a alloy made by adding some other metals to increase hardness and reduce melting points, as well as simulation gold jewelry. Different types of prices are different. To distinguish what kind of jewelry belongs to, avoid high -priced purchases that are not consistent with jewelry. The weight of the weight of the gold jewelry is greater than the imitation gold jewelry of the same size.
    3. Maintenance: Gold jewelry maintenance is important. Do not pull force to avoid contact with cosmetics such as flower dew water. Otherwise, it is easy to change color. It can be brushed gently with detergent in warm water, then rinsed with water and wiped.
    4, suitable: pay attention to the weight of jewelry, style, whether it is suitable, pay attention to wear gently when trying, do not pull, if it is a necklace, you can use gems, rings bracelets, etc. to pay attention to whether the size is suitable when you try to wear the size. Essence
    Reference materials Source: Baidu Encyclopedia-Copper
    Reference Data Source: Baidu Encyclopedia-Gold

  2. Lindsey

    1. It can be identified from color: Copper single quality is generally bright red, and the gold single quality is generally bright yellow.
    2. The method of burning can be identified: After a period of burning, black marks will appear on the surface of the copper, and gold is not.
    3. You can use chemical methods to identify: soak with concentrated sulfuric acid. After soaking in copper, irritating gas will be generated.
    4, density appraisal: The density of gold is larger than the bronze, so the gold volume of the same weight is less than the brass. Put them in the cup filled with water. On the contrary, it is brass.

  3. George

    Method 1: You can put the particles in a humid place! But the time president is a little bit. After about a few weeks, you are going to see if it becomes blue. If it becomes blue, it means that it is copper; if it does not change color, it may be gold, because gold is not easy to be oxidized by oxidation. Material. This method can only distinguish whether it is copper.
    Method two: Buy a little concentrated sulfuric acid from the market, and then put the particles inside and heated. If there is odor, it may be copper, which must not be gold. If there is no gas, it must not be copper, maybe gold. Because gold is a very lively metal. Gold can only be dissolved by Wang Shui.
    In what kind of substance or main ingredients are the particles, the most accurate method is to go to the Institute of Chemistry and ask the institute.

  4. Juan

    Seeing the color is not visible. The fake gold will add zinc inside the gold. The density of the gold is larger than the bronze. Put them in a cup full of water. It is brass.

Leave a Comment