The testing certificate of China Business Federation is reliable.

However, it should be noted that the certificate clearly says "the reason for the color is undetermined"

This is because the artificially optimized topaz color is also difficult to accurately identify; Moreover, we know that the artificially optimized topaz product may be bad for human body, but it is radiation.

S925 inlay, S925 is a silver material with 92.5% silver content, and the cost is low.

Therefore, the general market transaction price of this product is within 400 yuan, and the actual price is within 100 yuan.

Lottery discount is a common means of jewelry promotion, which is not credible.

More than 600 yuan is a bit expensive, not affordable and not cost-effective, but you can't lose too much.

If you return the goods now, it may be enough to find more people. If businesses pay attention to influence, they will generally succeed.

There are also many netizens who have successfully returned goods, similar situations.

Good luck!