Unique Design: This necklace combines the celtic knot with the birthstone, symbolizing eternal love, faith and friendship. Giving this necklace to your lover, family, friends will bring them unlimited good luck Material: 925 sterling silver with 18k white gold plated and 5A cubic zirconia. Hypoallergenic, nickel free, lead free Measurement: Box Chain Length: 45+3 cm/17.72+1.18 inch. Pendant Size: 9.5x16.5 mm/0.37x0.65 inch Meaningful Gifts: Delivery with a delicate gift box, a perfect gift for Anniversaries, Birthday, Mothers Day, Graduation Season or Christmas After sales Service: We are dedicated to satisfying customer service. If there is any problem with our product, please feel free to contact us, we will reply you as soon as possible