Magical Earth Theban Pentacle Powerful Protection Amulet Black Agate Magic Pendant Necklace Best Amulets Collection. Magical Earth Theban Pentacle Powerful Protection Amulet Black Agate Magic Gemstone Circle Spiritual Powers Pendant NecklaceMagical Earth Theban Pentacle Powerful Protection Amulet Black Agate Magic Pendant Necklace Gemstone Circle Size: 2 inches (50mm) Made from and 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