1, Hetian Moyu: Hetian Moyu is a rare variety of Hetian jade in Xinjiang with good quality. Its characteristics are compact and moist, pure and dark as ink, especially precious. Jet has a deep color, greasy texture, delicate texture, bright color and elegant appearance, which is highly respected and enjoys a high reputation.

2. Obsidian: Obsidian is a natural glass and a common black gem. Formed in the rapid cooling process after volcanic eruption, it has the characteristics of hardness and luster. Obsidian is dark and bright, and is often used to make jewelry and decorations, which is deeply loved by people.

3. Black Emerald: Black Emerald is a common black gem. Black emeralds are dark in color and hard in texture, and are often used to make jewelry and handicrafts.

4. Moyu Qinghua: Moyu Qinghua is one of the black stones in Xinjiang. Its color is mainly wrapped in graphite, which is turbid or banded ink. In the whole jade, the depth distribution is uneven, which is common in the transition part of sapphire and white jade.