Amulet Celtic Shield Knot Magic Heart and Protection Powers Blue Goldstone Pendant 18 Inch Necklace Best Amulets Collection. Unique and One of the Kind Celtic Shield Knot Magic Heart Protection Amulet. Amulet Celtic Shield Knot Magic Heart and Protection Powers Blue Goldstone Pendant 18 Inch Necklace Holds Heart Shaped Cabochon made from Blue Goldstone Crystal. Amulet Medallion Size: 30mm. The Image may show slight differences to the actual crystal and charm in color and texture. Ready to Wear with Beautiful Stainless Steel Link Style 18 Chain Necklace and Comes with Gift Packaging.