Each piece features a unique, colorful natural opal, making it a perfect gift for an October birthday or a special treat for yourself. Key Features: - Materials: Crafted from high-quality, nickel-free 925 Sterling Silver for sensitive skin. - Gemstone: Features a genuine, natural opal with unique color variations. - Sizing: The delicate pendant measures 9mm x 9mm. The chain is 15.7 inches (40cm) with a 2-inch (5cm) extender for the perfect fit. Care Instructions: To maintain its beauty, store in a dry place, avoid contact with chemicals like perfumes, and gently polish with a soft cloth.