This is Shakudani stone excavated from the ruins of the Asakura clan's residence. The top and bottom are flat. This stone is also called Echizen Aoi-ishi (Echizen Blue Stone), and has a characteristic blue-green color, which becomes a deep and vivid blue-green especially when wet. In Ichijodani, the home of the Asakura clan, a stone-built culture flourished using this Shakudani stone, and its unique green color can still be seen today in the gardens, foundation stones of building ruins, and stone walls within the ruins. The bead is made of lead.