A modern take on a vintage-inspired style: round-cut emeralds (1/3 ct. t.w.) and round-cut diamonds (1/10 ct. t.w.) perfectly meld for a vibrant but delicate look. Set in 10k gold button earrings. Almost all rubies are lead-glass filled. Surface cavities and fractures are filled with glass and glass-like substances that contain lead. Emerald is usually penetrated with oil, wax or resin to improve appearance. Often dyed with color agents. All gemstone carat weights (ct. t.w.), if mentioned, are approximate; variance may be .05 carat.