This is a natural malachite gradient bead necklace, a classic vintage jewelry piece. Core Material: Natural malachite, a copper-containing carbonate mineral, characterized by its unique deep green base color and concentric ring/wave-like texture. The green bands on the beads in the picture are clear and natural, typical of malachite. Color and Texture: The overall color is a rich emerald green, with flowing wave/concentric ring patterns. Each bead's texture is unique, and these naturally formed patterns are an important basis for identifying natural malachite. Clasp: A brass spiral clasp, a classic vintage jewelry clasp, sturdy and durable, reflecting the craftsmanship of antique jewelry. Meaning: In the West, malachite is known as the "stone of wife's happiness," symbolizing peace and happiness. In traditional Chinese culture, green represents vitality and hope, and malachite is also associated with warding off evil and providing protection. Chain Length: 52cm Bead Diameter: 0.5-1.3cm Weight: 61.6g