Joke Collection Website - Bulletin headlines - Do you buy men's gold necklaces by yourself in JD? COM?

Do you buy men's gold necklaces by yourself in JD? COM?

It's true.

It is reliable to buy gold jewelry in JD.COM. Most shops in JD.COM are flagship stores and official stores, with high quality and convenient after-sales. Moreover, the self-operated stores in JD.COM or the stores in JD.COM International are genuine, and the supply is guaranteed. Shops will also hang the slogan "fake one pays ten", so pay attention to the choice of shops and the logo of JD.COM when buying.

If you are not at ease, you can go to the counter to inspect the goods. If there are fakes, you can ask for a refund and three compensations.

You can also identify the authenticity of gold in the following ways:

(1) touchstone method: select a black touchstone with fine texture, draw traces on the touchstone with standard gold test pieces (for gold medals) with different gold contents, then scrape the gold jewelry sample to be identified on the same touchstone, add concentrated nitric acid to remove impurities, find out the traces left on the touchstone, compare with the drawn gold test pieces, find out the same chromaticity as the jewelry sample, and compare the standard degree of the gold sample, that is, the accurate gold content of the gold jewelry sample to be tested.

(2) Chemical method: also known as reagent spot test. Gold alone is insoluble in nitric acid, sulfuric acid and hydrochloric acid, while silver, copper and other components can react with nitric acid and be dissolved. Take a sample of gold ornaments. If nitric acid is placed in a certain part, it will not change color if it is made of gold, and it will turn black if it is made of silver. In the case of copper products, bivalent copper salts will be generated and green bubbles will be emitted. Gold ornaments with gold content above 95% have little surface change when tested with nitric acid.