This petite glass beaker in the New Orleans Museum of Art's collection is elegantly engraved with Baroque scrolls, birds, fruits and flowers. The special red “gold ruby” color made this cup incredibly ...

ALBANY, N.Y. -- Colored glass always has provided a fascination for the collector, especially the rich red of ruby glass. This type of glass, in which metallic oxides are used to create colors, is ...

Even the ancient Romans were familiar with processes for coloring glass by adding gold. Initially colorless, the glass takes on a ruby-red color when heated in a controlled fashion. The source of this ...