Black Agate Magic Powers Circle Dragon Spiritual Protection Pendant Necklace Best Amulets Collection. Black Agate Magic Powers Circle Dragon Spiritual Protection Necklace PendantBlack Agate Magic Powers Circle Dragon Spiritual Protection Pendant Necklace Circle Made from Natural Black Agate Gemstone Dragon Charm is made from Base Black Agate Circle Size: 40 X 40mm (1 1/2 inches) Comes with Adjustable Necklace, Shortest: 15 inches, Longest: 24 inches