Each piece in the new Bulgari Serpenti collection captures the flexible, slithering silhouette of the snake. The 18-karat pink-gold Serpenti bracelet ($68,000) shimmers with diamonds and mother-of-pearl, encircling the wrist in three tight coils, while the contemporary 18-karat pink-gold Serpenti earrings ($15,700) stack geometric diamond-and-pearl links on top of one another, resembling a snake’s scales. […]