Blue Opal Beaded Necklace Tiny 3mm Opal Bead Minimalist Jewelry 14k gold filled box chain 16 inch extension Gift Women Girl Necklace . This necklace is perfect for yourself, giving as a special gift, or bridesmaid necklace . **10x Opal bead BLUE color size 3mm **Length- 16 inch 2 inch extension. 14k Gold Filled box chain. All my jewelry are packed in an elegant gift box.