The Celtic knot is referred to as the mystic or endless knot. The Trinity Knot is said to be the connection between the mind, body, and spirit. Blue topaz is a birthstone for November ,and the gemstone of the 4th anniversary. In 925 sterling silver with the stamp 925. Plated in white gold for a luxe look. Handmade with love and care. Mainstone Size:4mm*4mm. Pendant Size:2cm*2cm. Total weight:1.8g Chain Type: 45cm 18" 925 Sterling Silver Italian Box Chain Include a luxury jewelry box, with a polishing cloth and a Best-wishes card. 925 Sterling Silver Irish Celtic Triquetra Knot Birthstone Pendant Necklace for Women Fine Jewelry Birthday Gift