A set. Of 6 hand cut cobalt blue to clear 24% lead crystal. These are larger sized wine goblets from poland. The art. Of making cut to clear crystal is a process where artisans start with a complete clear crystal stemware glass and coat with an. Outer colored layer and then by hand, using diamond wheels they cut through the blue exposing the clear and creating the beautiful contrast. Of the completed art glasses. precious metals are used to create the true cobalt blue crystal color in these fine stem ware pieces