Semi-polished Black Obsidian pieces, presented in a 1-kilogram box This set contains between 8 and 15 fragments of natural Black Obsidian in raw form but with one polished face. The total weight of each box is approximately one kilogram. The pieces retain their irregular shape, showcasing natural edges combined with a worked flat face that enhances the deep color and glassy sheen of the obsidian. The white cardboard box measures about 19 cm x 14 cm x 4 cm. It is shipped closed, and it is not possible to choose the contents individually. Obsidian is a volcanic glass of igneous origin, formed by the rapid cooling of silica-rich lava. Its conchoidal fracture and high luster make it instantly recognizable. It is attributed with the ability to act as a mirror of the soul, revealing hidden aspects of the psyche and aiding in deep introspection processes.