2. Pandora. Pandora logo ring necklace is a product of Pandora brand, which adopts ceramic series, with outstanding texture and versatile skin-friendliness. Pandora is a jewelry brand founded by PerEnevoldsen in Copenhagen, Denmark on 1982. It belongs to Pandora and is one of the three major jewelry brands in the world.
3. The green one may be patina, indicating that your gold necklace may be an alloy of copper, not high-purity gold. To know whether it is pure gold, just put your "gold necklace" in concentrated nitric acid and heat it slightly to see if the solution changes color.
4. no. If the green pendant on the pearl necklace is natural, it may be jade. Emerald is a kind of gem, mostly green in color, with high hardness, good toughness and wear resistance. Therefore, jadeite is widely used to make jewelry and decorations.
5. The green dot in jadeite is chromium. It should be said that the greener the better, but it also depends on the quality of "planting". Generally, impenetrable jadeite is low in price, and it is best to be transparent and bright green (of course, if it is A goods). There is also a 100 yuan A, but it is colorless and seedless! I suggest you go to Chuncui. For more information.