The main varieties of gold jewelry are rings, earrings, necklaces, dry bracelets, brooches, etc. When buying gold jewelry, you must first identify its authenticity by:
1. 掂 weight. Gold jewelry has a larger weight than diamonds of the same size.
2. Listen to the sound. Throw the gold ornaments to the ground, :, will emit a "squeaky sound, the low content is clear and crisp.
3 look at the color. The luster of gold jewelry is enduring, the jewelry with high gold content is red, and the difference is yellow.
4. Test hardness. The gold content of the jewelry is softer from the higher, with a hard needle tip, there are obvious traces; the impression with low gold content is blurred.
5. The hand is bent. The real gold is soft, the hand is bent, the bend is not easy to break, and the jewelry with poor color is easy to break.
6. Burn with fire. Burning the ornaments with fire, the real gold is resistant to burning and does not change color. After the fake gold burns, it loses its luster and even turns black and purple.
7. Acid test. Gold is insoluble in hydrochloric acid, sulfuric acid, and nitric acid, while other metals change when they encounter triacids.
Pu Insoles,Shoe Insole Pad,Pu Shoe Sole Pad,Pu Foam Shoe Pad
Henan Bangni Biotechnology Co.,LTD , https://www.insolesbangni.com