Delfina Delettrez's contemporary jewelry is all made by hand in her Roman atelier - "I don't usually draw a sketch, I draw the final piece, like an illustration, " she says of her design process. Cast from 9-karat gold, this phalanx ring is tipped with a pair of prong-set purple topaz totaling 0.40-carats. The slim, lightweight design makes it perfect for stacking with other pieces.