Method 1: Observation method
By carefully checking whether the gold ornaments have the characteristics of real gold.
1, looking for the official logo. The mark will show the purity of gold (1-999 or 0. 1-0.999) or the carat number (10K, 14K, 18K, 22K or 24K). You can see more clearly with a magnifying glass. However, the marks on the old gold ware may be worn off, and the fake gold may also have marks, because further verification is needed.
2. See if the gold has faded. It is very important to check whether the parts (especially the edges) where the gold wares are easy to wear have faded. If the gold ware is faded and the faded part reveals the color of other metals, then your gold ware may only be gold-plated.
Method 2: Bite method
This simple and effective method is generally not recommended because it may cause damage to teeth. In addition, because lead is softer than gold, there will be bite marks on the gold-plated lead, which will lead to identification errors.
1, first of all, bite the gold properly.
2. See if there are any bite marks on the gold ware. Theoretically, real gold will leave bite marks after being bitten, and the deeper the bite marks, the higher the purity of gold.
Method 3: magnet attraction method
Absorb gold with a magnet. Gold is not a magnetic metal, so if a magnet can attract gold, it is fake. But the fact that it can't be attracted by magnets alone can't prove that this gold object is real, because it may also be made of other non-magnetic metals.
Method 4: Density test method
1, weighing. If you don't have your own balance, you can ask jewelry to weigh it for you, which is generally free. The weight should be accurate to the gram.
Fill a small bottle with water. It is best if there is a millimeter scale on the bottle wall, which will help you complete the test more conveniently. It doesn't matter how much water there is, as long as the water doesn't overflow after the gold is put in, so don't fill it up. Carefully record the water level before and after putting it into the gold container.
3. Put the gold in the measuring bottle. Record the change of water level before and after, and then calculate the added value of water, accurate to milliliter.
4. Calculate the density with the following formula. Density of gold wares = total weight of gold wares/volume increased by water. If the density is close to 19g/ml, it is real gold or a metal with a density close to gold. According to the formula to calculate the density, whether this result is close to the density of real gold can confirm the authenticity.
2. Scrape the porcelain plate with gold. If there are black scratches on the porcelain plate, your gold ware is not real gold. If the scratches are gold, it is real gold.