Sigil of the Archangel Zadkiel Amulet Black Agate Magic Pendant Necklace Best Amulets Collection. Sigil of the Archangel Zadkiel Magical Amulet Amulet Black Agate Magic Gemstone Circle Spiritual Powers Pendant NecklaceSigil of the Archangel Zadkiel Amulet Black Agate Magic Pendant Necklace Gemstone Circle Size: 2 inches (50mm) Made from Natural Gemstone and may have some natural specks making your Amulet very unique and special. Each Magic Archangel Symbol is Engraved on top of the Gemstone Circle. Comes with Adjustable cord, and adjusts from 15 inches up to 24 inches.