Few pieces in jewelry are as illustrious as a tennis bracelet. Simple and clean, women have long favored the sparkling strand of diamonds at the wrist for instant, effortless day or night glamour. Now, the designer Eva Zuckerman of the contemporary fine jewelry line Eva Fehren has made a version of the classic with blackened white gold and gray diamonds. "I wanted to design a tennis bracelet that felt timeless and tough," Zuckerman says, "to add a modern, punk edge to a more traditional style." Turned upside-down, each diamond is set within a hexagonal shape that reinforces the geometry of each stone, "transforming it into something refined, delicate and precious," Zuckerman says. Eva Fehren bracelet, $9,955; barneys.com.