Oxidizing:  Method of chemically accentuating and enhancing the beauty of ornamentation by the application of
an oxide, which darkens the metal wherever applied.  Over time, silver will oxidize on its own.
Ort Bowl:  See Waste Bowl.
Open Stock:  A sales term referring the ability to buy individual units rather than an entire place setting.  
Old Sheffield / Old Sheffield Plate:  See Sheffield Plate.
Ogee:  An S shaped profile.
Objects of Virtu:  Small luxury items such as needle cases, seals, snuff boxes, and vinaigrettes.
Oxidation:  Naturally occurring tarnish which, on a properly polished silver piece, enhances the details and adds
to the beauty of an item.
Open Work:  A pierced decoration.  
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