This is a blue sandstone beaded necklace. Blue sandstone: Blue sandstone is a type of crystal that appears deep blue or purplish-blue due to the presence of scaly azurite. It is a popular crystal, formed by countless fine blue flakes, resembling a starry sky. Blue sandstone is close to purple in color, with the sand-like inclusions being blue, hence the name. Blue sandstone symbolizes opportunity and has a hardness of 5-6. Clasp: The clasp is made of sterling silver, featuring a classic marquise shape with engraved patterns on the surface and the word "SILVER" clearly engraved on the inside. It is a common retro jewelry clasp style from the mid-to-late 20th century. Meaning: In crystal culture, blue sandstone is known as the stone of courage, symbolizing composure and guidance; sterling silver represents protection and purity. The combination of the two is both decorative and auspicious. Craftsmanship: The beads are uniform in size and neatly arranged, strung using traditional hand-stringing techniques. The total length of a single loop is 40.5cm, suitable for wearing as a long necklace. Bead diameter: 8mm round beads.