The Change-UpIf we know anything about the millennial generation, it’s that the demographic loves putting their own finishing touches on purchases—a preference on which several bridal jewelry makers are trying to capitalize in some new lines.Stuller’s Solitaire Connections: Phase II Phase I of the system, which debuted last year, included 10 different styles of heads, collars, and shanks that can be mixed and matched in-store and clicked together to assemble hundreds of different ring looks. Phase II, according to Nate Button, product manager, findings, will feature a streamlined, more “user-friendly,” fumble-free setup. Buy-in is about $6,000 in 14k gold and diamonds for a display system of 10 collars, shanks, and heads; the more popular Continuum silver set is about $2,200 (both prices hinge on metal pricing). Once customers choose final components, stores can solder pieces t