Opal Necklace Pendants in 8 Colors 925 Silver Opal Necklace Pendants in 8 Colors. Hamsa Hands made entirely of Opal including a Choker Necklace in 925 Silver Jewelry Pendant Size: 7*5mm 10*8mm 11*13mm 10*14mmMaterial: Semi-precious StoneMaterial: 925 Silver+opal stoneNecklace length: 45 cm