Navel of obsidian. Mineral: Obsidian black Color: Black Measure: 1.5 cm Properties: Obsidian helps to block negative energies, dissolving energy blockages and stresses. These navels are used to balance the person from within, thoroughly clean the energy that is blocked and protect from negative energies. Note: Due to the nature of the product, shades, veins and measurements may vary slightly. It cannot be guaranteed that they are identical to the images.