Celtic Triquetra Knot Protection Amulet Hematite Gemstone Heart Pendant Necklace Best Amulets Collection. Celtic Triquetra Knot Protection Amulet Hematite Gemstone Heart Pendant NecklaceCeltic Triquetra Knot Protection Amulet Hematite Gemstone Heart Pendant Necklace Pendant Size: 45mm (about 2 inches) Comes in Hematite Gemstone and Stainless Steel Celtic Charm Comes with Adjustable Necklace, Shortest: 15 inches, Longest: 24 inches Comes with Branded Packaging