Final answer:
The Jade Cong from Liangzhu culture, China, is a significant historical artifact dating from about 3,300 to 2,200 BCE, made from nephrite jade and reserved for elite or spiritual uses.
Step-by-step explanation:
The Jade Cong is an ancient artifact from the Liangzhu culture, which existed in the region of present-day Jiangsu in China. This culture is known for its sophisticated jade craftsmanship dating back to around 3,300 to 2,200 BCE.
Jade in ancient China was indeed a highly valued material and was often used in creating intricate ornaments and talismans, considered to be reserved for the elite or used in spiritual ceremonies. Specifically, the nephrite form of jade, which is referenced in the question, was prized for its durability and beauty.
The mention of the Bronze Age in relation to the Liangzhu culture's timeframe is slightly misleading, as this period in ancient China traditionally refers to a later era, following the Liangzhu's decline.