Opal Necklace: Celtic Knot is the symbol of good luck.The black onyx necklace has a unique color, which can be worn for daily or party Size: Celtic knot opal pendant is 1.06 * 0.62 inches(27*16mm); Chain length: 18+2", box chain Material: Celtic knot necklace made of 925 Sterling Silver with opal. Silver is a hypoallergenic metal, making it a great choice for people Celtic Knot Jewelry Gift: 1*Celtic knot opal pendan necklace,1*gift box,1*polishing cloth.Giving jewelry as a gift is a timeless and meaningful gesture that conveys love, appreciation, and celebration. Whether for a loved one, mom,wife,friend, or yourself, jewelry is a perfect way to show love, thoughtfulness, and gratitude Tips: Silver opal jewelry is prone to oxidation over time due to exposure to air and moisture. By taking proper care and storing your jewelry correctly, you can prolong its lifespan