Green stone

The "smooth silver case" in which Haines carries his cigarettes befits a man who “comes from Oxford,” and the "green stone" that sparkles amid the grey metal, like Ireland in the sea, symbolically suits the Englishman's status as "the seas’ ruler." Haines graciously offers Stephen a cigarette from the case, his noblesse obliging him to share his wealth with the impoverished Irishman next to him, even as he apologizes for the injustices of history.

JH 2011

Interior of English silver cigarette case from 1924. Source:

Exterior of Russian silver cigarette case from mid-1910s. Source: