A 999足金鱼尾项链 sounds like a beautiful piece of jewelry!

999足金 refers to 24K gold, which is 99.9% pure gold、

鱼尾 (yú wěi) means fish tail in Chinese、

So, a 999足金鱼尾项链 is a 24K gold fish tailshaped necklace.

Is there something specific you'd like to know about this type of necklace, such as:

* Design and style?
* Meaning or symbolism behind the fish tail design?
* How to care for and maintain the necklace?
* Where to buy or purchase one?

Let me know, and I'll do my best to help!