Om Mani Padme Hum Mantra Amulet Green Quartz Magic Circle Pendant Necklace Best Amulets Collection. Tibetan Om Mani Padme Hum Mantra Amulet Green Quartz Magic Gemstone Circle Good Luck Powers Pendant NecklaceOm Mani Padme Hum Mantra Amulet Green Quartz Magic Circle Pendant Necklace Gemstone Circle Size: 2 inches (50mm) Made from Natural Gemstone and may have some natural specks making your Amulet or Talisman very unique and special Each Magic Symbol is Engraved on top of the Gemstone Circle Comes with Adjustable cord, and adjusts from 15 inches up to 24 inches