Explore the mystical beauty of this Blue Opal Four Leaf Clover Sterling Silver Necklace. The captivating blue opal shines with every move while the sterling silver adds a touch of elegance. Let this necklace bring good luck and positive energy to your everyday style. Closure: Spring ring claps. Length: 16 + 2 Inch Adjustable. Chain Type: Curb Chain. Chain Thickness: 1mm.