A colorful round-shape ruby (3/5 ct. T. W. Is the star attraction of this gorgeous round-shape diamond (1/5 ct. T. W. Halo pendant necklace created in 14k white gold. Approximate length: 16". Approximate pendant diameter: 3/8". Boxes, or APOs. Almost all gemstones have been treated to enhance their beauty and require special care. All gemstone carat weights (ct. T. W. If mentioned, are approximate; variance may be. 05 carat. Almost all rubies are lead-glass filled. Surface cavities and fractures are filled with glass and glass-like substances that contain lead. After delivery, visit a Macy's store with your dated receipt and jewellery purchase to sign up.