1 Guru Bead set - 3 hole Mahagony Obsidian gemstone Guru column Bead set 10 mm size - GB006A 1 Guru Bead set - 3 hole Mahagony Obsidian gemstone Guru column Bead set 10 mm size Size - 3 hole guru bone bead is approx 10 mm wide . Guru column bead is approx 7 - 8 mm height x approx 7- 8 mm wide at base Ships from USA