Obsidian

Obsidian is a natural volcanic glass formed when lava cools rapidly without crystallization. Its color varies from jet black to smoky gray, with occasional hints of other colors. This glassy, smooth-textured stone has been used for millennia in tools, weapons, and ornamental objects due to its sharp edges when fractured. In metaphysical beliefs, obsidian is associated with protection, grounding, and insight, making it a popular choice for spiritual practices and jewelry.