Obsidian stones are beneficial for promoting physical wellbeing. They can be used to remove blockages and improve digestion. It is thought to help detoxify, improving circulation and easing joint problems. Like other crystals such as Malachite, it protects against electromagnetic energies from computers and cellphones. Placed appropriately, an Obsidian crystal is said to help reduce pain. It should be used with care as it can release long forgotten memories.