ˈoʊpəlˌaɪn ɡlˈæs wʌz pɹədˈuːst ɪn lˈɑːɹdʒ kwˈɔntᵻɾiz ɪn fɹˈæns ɪnðə nˈaɪntiːnθ sˈɛntʃɚɹi ænd ɹˈiːtʃt ðɪ ˈeɪpɛks ʌv dᵻfjˈuːʒən ænd pˌɑːpjʊlˈæɹᵻɾi dˈʊɹɹɪŋ ðɪ ˈɛmpaɪɚɹ ʌv nɐpˈoʊlɪən ɹˌoʊmən θɹˈiː; bˌʌt ðə pˈiːsᵻz mˌeɪd ɪnðə pˈiəɹɪəd ʌv nɐpˈoʊlɪən ˈaɪ, wˌɪtʃ ɑːɹ tɹænslˈuːsənt, ɑːɹ ðə mˈoʊst sˈɔːt ˈæftɚ baɪ ðɪ æntˈiːks mˈɑːɹkɪt.
Opaline glass was produced in large quantities in France in the nineteenth century and reached the apex of diffusion and popularity during the empire of Napoleon III; but the pieces made in the period of Napoleon I, which are translucent, are the most sought after by the antiques market.