Obsidian Crystal Sphere / Ball 10-point scale of mineral hardness: 5.0 (10 - Hard, 1 soft) Care has been taken to ensure that weights and measurements are as accurate as possible, however please do note that these are only approximate. Black obsidian is a rough glass-like rock that forms after volcanic lava cools down quickly. It is a very hard stone to touch and although it has some smooth areas, you have to be careful of its edges because they can be very sharp in their raw form. Obsidian Metaphysical properties include: - Dissolving pain - Boosting wisdom, learning, intuition - Spiritually grounding - Boosts creativity - Helps with scrying effectiveness