How do I identify genuine Bristol blue glass?

Genuine eighteenth and nineteenth-century Bristol blue items typically display a deep, saturated cobalt hue achieved through cobalt oxide. They often exhibit pontil marks on the base from hand-blowing. Examine the weight and clarity of the metal, as older pieces often contain lead and show minor surface wear appropriate to their age.

What is opalescent Art Deco glassware?

Opalescent glass contains chemical agents that create a milky, translucent quality with shifting blue or amber highlights. French makers popularized moulded versions featuring motifs like birds, figures, and botanical elements. These pieces rely on changing light to reveal depth and contrast across their frosted surfaces.

How should I clean antique glass?

Wash antique glass gently by hand using lukewarm water and mild detergent. Avoid abrasive sponges or harsh chemicals that can damage enamel work or gilt details. Dry the pieces immediately with a soft, lint-free cloth to prevent water spots on delicate surfaces.