Obsidian Ganesha

Obsidian is considered the stone of the Mayan and Aztecs. The volcanic rock was so abondant in the region that they used it for pretty much everything from utensils, to jewellery to weapons and therefore never really developed metallurgy. Obsidian had more value than Gold.Obsidian is a natural volcanic glass, formed when lava solidifies so quickly that mineral crystals do not have time to grow. The name Obsidian simply refers to glassy texture, and technically obsidian can have any chemical composition. However, most Obsidian  is similar in composition to rhyolite, and is commonly found on the outer edges of rhyolite domes and flows. Like rhyolite, Obsidian can show flow-banding. It is also found along the rapidly cooled edges of dykes and sills.