The third coin from the "The Four Auspicious Beasts" series. One of the Four Auspicious Beasts, representing Winter and the cardinal direction of the North is the Black Tortoise. Also known as Xuán Wǔ (玄武) in Chinese,the Black Tortoise of the North is usually depicted as a snake coiled around the body of a tortoise. It is the belief of ancient Chinese that the tortoise and snake are spiritual creatures that symbolize longevity - the tortoise being representative of resilience and tenacity, and the snake illustrating vitality and intelligence. The reverse pictures the tortoise shell and skin of the snake with beautiful ornate detail, brought to life on a super ultra-high relief. Both their jaws are open with teeth bared as a show of the Black Tortoise’s powers. A layer of gold is carefully gilded onto the Black Tortoise’s Chinese name and the title of the series to match its prowess and stature as one of the four Auspicious Beasts. An ancient Chinese constellation map sits on its obverse surrounding an octagon shape inspired by the yin-yang elements that houses the legal tender, the Coat of Arms du Tchad. Through the use of a new minting technique called “Bi-Metal Reverse”, this piece achieves a remarkable weight and 80 mm diameter size - making it double the size of a regular 2 oz collectible. By combining 2 oz of silver as a base with a top layer of 11.5 oz of copper, the result is a super ultra-high relief that brings out every detail to maximum effect, then finished with antiqued silver to conclude.