- Apr 04, 2018-

The fineness of the gold necklace is three kinds of red gold, 18K, 14K; the fineness of silver is 92.5% silver content and silver gold plating; the jewelry used as necklace is diamond, ruby, sapphire, emerald, jade, natural pearl, etc. The materials also include agate, coral jade, ivory, cultured pearls and other medium and low grade materials. Jewelry necklaces are more decorative than gold and silver necklaces, and their color changes are more abundant, especially among young and middle-aged people.