The Jianguo weekend market, right next to that runs all along the underside of a highway overpass and includes a jade, flower and artist market. The jade market is by far the most interesting of all the markets taking place. Just aisles and aisles of not only jade, but other gemstones, preserved wood, pearls and tons of jewelry making supplies and displays. There were fruits and animals carved out of single pieces of stone!
The flower market made me feel angry I didn't live in a place with more of a consistently temperate climate. The artist market was tiny and cheesy for the most part, but still fun to wander.
Hot bargaining tip! Tell vendors that you are buying to sell the gems yourself and they will give it to you for a cheaper price.