Souvenir of obsidian stone (Obsidian) (bead size 10.5 mm)

Obsidian or volcanic glass, a shiny black stone with dark oily-colored ripples appearing on the surface of the beads. Bead size: 10.5 mm. Number of beads: 33 beads. Weight: 65 grams. Color: shiny black with dark oily-colored streaks. The clasp: metal. The pendant: metal.