Best Amulets® Collection. Unique Celtic Shield Knot Amulet Lucky Flower Shaped Donut Pendant Necklace. Donut Size: 30mm. Unique Celtic Knot Bail is made from Silver-Tone Base metal. The Natural Properties of Mined Gemstones define the Unique Nature of each piece and no two pieces are every alike. Comes with Gift Style Packaging. Absolutely Unique and One of the Kind Celtic Shield Knot Amulet. Celtic Bail is made from Silver-Tone Base Metal. Lucky Donut is Designed as Lotus Flower and made from Genuine and Natural Light Green Serpentine Gemstone and makes isAbsolutely Special and One of the Kind. This Amulet represents Spiritual Protection, Magic and Good Luck Powers and makes it Individual Good Luck Charm Amulet. Stay Unique, Special and Attractive with your Own Individual Celtic Shield Knot and Lucky Donut Amulet. Celtic Shield Amulet meaning: Celtic Shield Knot comes from Very Ancient Civilizations. Universally used for warding off evil spirits and protection from danger. The symbol is always fourfold based, but within a greater unity. Invoked as a ward to keep negative energy away. Corners of the knot are meant to represent the four elements of Earth, Air, Fire and Water.