The color of the Yajin I bought when I was traveling has faded. Is it fake? How can I tell the difference?

Common sense of gold identification:

Color identification method. Gold is "seven greens, eight yellows, nine purples and ten reds". This means that the cyan one contains 70% gold, the yellow one contains 80% gold, the purple one contains 90% gold, and the red one contains almost 100% gold.

Voice identification method. Let the jewelry fall on a hard place. If the sound is dull, it means it is of good quality. The sound is crisp and clear, indicating poor color quality.

Bending identification method. Pure gold is soft and has low hardness. You can make shallow marks with your fingernails and bite marks with your teeth. Gold jewelry with high fineness is softer than gold jewelry with low fineness. The more copper it contains, the harder it is. The bending method can also test the hardness. Pure gold is soft and has low hardness. Gold is soft and easy to bend. The lower the purity, the harder it is to bend.

Of course, these are all methods of identifying authenticity without professional identification to prevent being deceived. Gold identification

Ashy gold:

Ashy gold, an imitation gold alloy. With copper, lead, zinc, nickel, tin, etc. as the main materials, there are many new imitation gold materials with copper as the matrix. Jewelry made of sub-gold has an appearance and color similar to 18K gold, and a texture similar to K gold. The advantage is that its resistance to corrosion by human sweat and air pollution is better than brass and silver, but still lower than gold, so it is called For Yajin.