We just learned about three of the ancient Chinese Six Ritual Jades:
Cong - earth, Bi - sky/heaven, and Huang - North.
Another of the Six Ritual Jades was the Hu.
This was something like a vase, and it was used to mean "West".
![jade vase, hu, west](https://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/Chinese_-_Bottle_with_Archaic_Bronze_Motifs_-_Walters_42275.jpg/242px-Chinese_-_Bottle_with_Archaic_Bronze_Motifs_-_Walters_42275.jpg)
(from: wikipedia - category:chinese jade)
Kid Facts - Blast from the past: David - Michelangelo