Amulet Mantra Om Mani Padme Hum Lotus Celtic Shield Knot Pendant Necklace Best Amulets Collection. Amulet Original Tibetan Mantra Om Mani Padme Hum Lotus Celtic Shield Knot White Horn Magic Pendant NecklaceAmulet Mantra Om Mani Padme Hum Lotus Celtic Shield Knot Pendant Necklace Size: 30mm X 30mm (1 1/4Inch). Made from Natural Buffalo White Horn. Hand Carved Symbols makes the Amulet Unique and no two pieces are ever alike. Comes with Adjustable Cord and makes it Ready to wear: Shortest 15 inches, Longest 24 inches. Comes with Branded Packaging