Jay Carlile has been a top behind-the-scenes jeweler in Beverly Hills for more than a decade. Now he is stepping into the spotlight with his own eponymous jewelry collection, Jay Carlile and Co. The line features a mix of blockbuster diamond earrings; fanciful pieces like a dragonfly brooch in opals, sapphires, and tsavorites; and cocktail rings with colorful, oversize center stones, including fire opals, spinels, and tanzanites. Carlile’s goal is to create “quality, wearable pieces that aren’t just for the re…