due to the presence of Human Hair Wigs iron and magnesium. Obsidian is transparent to opaque with a vitreous luster and has been used as a gemstone for many years. Obsidian gemstones are often made into cabochons, carvings or Hair Extensions cut into spheres.Opal in matrix is a "type 3" opal that occurs when precious opal is randomly dispersed in tiny fragments throughout the host Virgin Hair rock, unlike boulder opal.