I'm puzzled by this query and by your answer, Ivo. All my life, in my various necks of the woods, the word "ruby" has been used as an alternative to "red" for any glass of that colour even if it were made yesterday. It is often qualified by a word indicating its composition, for example gold ruby, selenium ruby, or copper ruby.
Have I been missing something all these years or is this dependent upon where one lives?
Adam D.