Declension table of mahāratna

Neuter	Singular	Dual	Plural
Nominative	mahāratnam	mahāratne	mahāratnāni
Vocative	mahāratna	mahāratne	mahāratnāni
Accusative	mahāratnam	mahāratne	mahāratnāni
Instrumental	mahāratnena	mahāratnābhyām	mahāratnaiḥ
Dative	mahāratnāya	mahāratnābhyām	mahāratnebhyaḥ
Ablative	mahāratnāt	mahāratnābhyām	mahāratnebhyaḥ
Genitive	mahāratnasya	mahāratnayoḥ	mahāratnānām
Locative	mahāratne	mahāratnayoḥ	mahāratneṣu

Compound mahāratna -

Adverb -mahāratnam -mahāratnāt