Glass is seemingly everywhere, but not all glass is created equal—and just how unequal can be a bit of a mystery. If you have acquired glassware from a grandparent, estate sale, or antique or ...

Glass can be notoriously difficult to identify. Signatures, if there are any, can be faked, molds can be reused, and glassmakers often imitated one another’s decorations. Stiegel-type glass is an ...