Arrowheads of Outrageous FortuneCoomi Bhasin, whose Secaucus, N.J.–based Coomi brand has earned a ­reputation for making inventive jewelry with an ultra-luxe sensibility, is ­bringing the ancient past into the current season with her new Antiquity Arrowhead collection. Made in 20k gold and diamonds, the collection centers on arrowheads dating to 5,000 B.C.  Originally used as tools and artistic instruments, arrowheads helped our tribal ancestors hunt for food and carve Paleolithic and Neolithic cave ­drawings. The artifacts in Coomi’s collection were discovered in the Indus Valley—in the northwestern region of India—and in Mesopotamia (the land between the Tigris and Euphrates rivers in present-day Iraq, often called the cradle of civilization). She has paired the rough pieces with precious accents to show respect, she says, for the spirits invoked by them. Retail prices