1, with different purity. Gold includes pure gold and k gold. The gold content of pure gold is 99.9%, while the gold content of K gold is only 9 1.6% and 75%. K gold contains gold, so its color is lighter than pure gold.
2, the production process is different. Even if they are all 9999 gold jewelry, the color of ordinary hard gold jewelry is yellower and brighter than ordinary jewelry.
3. Because the royal craft of gold does not contain 65,438+000% gold in real life, it will be mixed with other impurities, and the surface will produce red spots when it is placed in the Korean Wave environment for a long time, and gold will also produce red spots when it meets acid, which is caused by internal impurities and oxidation of the oxide layer on the jewelry surface.