Obsidian is the name given to volcanic glass – a rock rather than a mineral, it is a mixture of cryptocrystalline grains of silica minerals in a glass-like suspension and displays a conchoidal fracture. Obsidian forms during the last stage of volcanic activity, close to the earths surface cooling occurs too quickly for crystals to grow. Natural obsidian varieties include black, bluish, mahogany, gold & silver sheen, rainbow, etc. – the colors due largely to refraction by microscopic bubbles (and microscopic mineral inclusions such as magnetit in “Rainbow Obsidian”). Lustre: Vitreous
The pyramid as a shape is based on sacred geometry. Most often associated with the ancient Egyptians, but has been used by many cultures. Metaphysically, pyramids can be used to generate and focus energy. They are perfect for programming (dedicating to a specific purpose), and are said to help us to reach our goals, by helping us to focus energy to bring things to a point or culmination. They can also be used to charge water or other crystals.