volcanic glass obsidian mirror, earliest known manufactured mirrors (approximately 8000 years old), found at the Neolithic site of Çatalhöyük in Turkey. These mirrors were from obsidian (volcanic glass), and had a convex surface and, Amazon.com: Natural Black Scrying Mirror, Healing Obsidian Mirror with Stand, Witchcraft Black Mirror, Crystal Decor with Shelf, scrying mirror obsidian, Divination, Meditation, : Home & Kitchen