True to form, the 77th annual American Gem Society Conclave, held April 22–25 in New Orleans, delivered on its reputation for providing retail-focused education against the backdrop of a ­rollicking good time.Memorable for its Crescent City setting, which included a slew of decadent Cajun meals and the requisite masquerade ball, the conference opened with a feel-good keynote address by Pro Football Hall of Fame quarterback Terry Bradshaw, who urged attendees to embrace competition, focus on family, and avoid complications in life. “I learned early on, especially in the NFL, you gotta keep things simple,” he said.To a large extent, the education at Conclave 2015 adopted the same streamlined philosophy.“The underlying theme of Conclave is how to nab this millennial audience: How do we sell to them?” said Nikki Spangler, a jewelry marketing specialist at TheKnot.com, during a sem