金剛石: diamond

(mineralogy, gems) a diamond

今後: from now on

the real thing; the genuine article; not a fake / being lifelike / state of being real

a ring (round piece of (precious) metal worn around the finger)

(literary) they (about women or girls)

(colloquial) a girlfriend (a female partner in a romantic relationship)

(formal) Female third-person singular pronoun; she, her, girlfriend

luxurious

luxuriousness