Obsidian is molten lava that cooled so quickly it didn’t have time to crystalize. It is a stone without boundaries or limitations and therefore works extremely fast and with great power. Truth enhancing and reflective, it exposes weaknesses and blockages. Used carefully it provides deep soul healing. Strongly protective, it forms a shield against negativity and environmental pollution. This stone stimulates growth on all levels, opens horizons, encourages exploration of the unknown. Promotes compassion, strength, self control. Repels negativity and unloving thoughts, provides support during change. These pyramids are 4.5 oz and have a 2" base.