Which is better, obsidian or black agate?

Obsidian is better. Obsidian can ward off evil spirits and effectively resolve negative energy. Among the ancient Buddhist relics in China, there are quite a few obsidian relics or Buddha statues about town houses or evil spirits. Obsidian is also the best gem for Buddhist practice now. In the crystal family, obsidian is also one of the strongest crystals to eliminate negative energy. Therefore, it can be placed in a place with heavy suffocation, or even made into an obsidian Buddha statue, which has a super agate effect on avoiding evil spirits: it can improve the reproductive system. Psychologically, it makes people detached from the complex environment, increases people's self-confidence, avoids fear and anxiety, and prevents negative energy violations such as spells and witchcraft.