Though California is home to several historic, beloved sparkling wine estates like Schramsberg and Domaine Carneros, U.S.-based brands never achieved the cult-level following of France’s top Champagne producers like Selosse or Salon. But in 2014 a distinct sparkling wine project emerged from California that immediately grabbed the attention of the wine industry. The dazzling bottle, called Ultramarine, sparked a fervor among somms and collectors only typically seen for the hottest grower Ch...