They say diamonds are a girl’s best friend, but designer Jack Kelége might beg to differ. His favorite gemstone? Naturally, diamonds. His favorite cut? Round brilliant. Of course, what would you expect from a man who makes his living creating jewelry—engagement rings, especially—with some of the most spectacular specimens of that stone you’ve ever seen? “The best thing about being a bridal designer, for me,” says Kelége (pictured), “is designing something that is not only a symbol of commitment and love, but will be cherished for a lifetime.” Check out his sparklers in person at JCK’s LUXURY show May 31–June 6.  Age: 66 Number of years in the biz: 50-plus  Number of employees you oversee: 20-plus Molly Family and pets: Molly is our Pomapoo. We also have a parrot. Describe your personal style: I’m drawn to anything classic. I