The valuable item that was a trade good during the Shang dynasty was silk.
1. Silk was highly prized and sought after during the Shang dynasty due to its luxurious quality and the intricate weaving techniques used by the Chinese at that time.
2. The Shang dynasty, which existed around 1600-1046 BCE, was known for its advanced craftsmanship, including the production of silk textiles that were traded both domestically and internationally.
3. Silk was not only used for clothing but also for diplomatic gifts, establishing trade relationships, and as a symbol of wealth and status.
4. Other items like steel, ivory, and ironwork were also valuable during that time but silk stood out as a significant trade good associated with the Shang dynasty.