Zen Pendant - Forbidden City Qin Dynasty with Black Agate. The genuine black agate is set in oxidized sterling silver. This silver and black pendant measures approximately 1 inch by 1 1/4 inches and is on a 17-inch 6-strand red neck wire.The Zen Collection is based on the Qin Dynasty from Ancient China in which Qin Shi Huang ruled as First Emperor of a unified China. He is regarded as a farsighted ruler who destroyed the forces of division and established the first unified centralized state in Chinese history. Qin Shi Huang is most known for commissioning the Great Wall of China and being buried with his army of Terracotta Warriors.