Velvet obsidian is a type of volcanic glass, characterized by its deep black colour and an iridescent, "velvety" sheen with swirling rainbow colors visible under light. As obsidian, its primary physical properties include a Mohs hardness of 5 to 5.5, conchoidal fracture, and amorphous crystal structure. Metaphysically, it is known for powerful protective and grounding energies, a strong connection to intuition and the Third Eye chakra, and its ability to aid in spiritual journeying.