Era: Modern Estate Composition: Platinum Primary Stone: One Natural Cabochon Opal Carat Weight: Approximately 1.35 Carats Accent Stone: Eighteen Round Brilliant Diamonds Carat Weight: 0.31 Carats In Total Color/Clarity: H-I / SI1-2 Necklace Length: 18 Inches Necklace Weight: 4.9 Grams Item Barcode: 431899