Add a spoonful or two of the metallic silver sugar to a shallow dish. Moisten the rims of four chilled champagne flutes or coupes with the simple syrup and dip into the sugar. Set aside.
Add 2 tablespoons of pomegranate juice to each glass. Top with the champagne, prosecco or sparkling wine and serve immediately.
Optional: Add fresh pomegranate seeds to each glass as an extra garnish.