ðə fɹˈɛntʃ fˈæktɚɹi pˈoːɹɾɪˌʌ vˈæleɪɹˌɪsθəl ɪn nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi hɐz pˌʊt ˈoʊpəl ɡlˈæs ˈɑːbdʒɛkts ɔnðə mˈɑːɹkɪt ɪn ɐ pɚtˈɪkjʊlɚ blˈuːˈæʒɚ kˈʌlɚ.
The French factory Portieux Vallérysthal in 1930 has put opal glass objects on the market in a particular blue-azure color.