Jade to Order Sixth-generation diamantaire Jade Lustig knows sparkling stones and how to fashion them into covetable collections. Her family business, De Beers sightholder Trau Bros., has a New York City–based division called S. Trau that sold loose stones. But when cutting facilities migrated to other countries, Lustig, who’d joined S. Trau in 1998, temporarily lost her ­luster for the business. “As soon as we stopped ­cutting, my creative outlet disappeared,” she says. “Then we were just reselling stones and the only value we could offer was if we were nicer or quicker than the next dealer.” But in 2011, an invitation from Forevermark to create a jewelry collection reignited her creative flame. She jumped at the chance not only to craft a 15-SKU bridal line for Forevermark, but also to design an even larger contemporary diamond jewelry line for herself. While sh